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AP English Language and Composition Practice Quiz: Relevance, sufficiency, and credibility in paragraphs

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Test your understanding with short quizzes. This quiz has 10 questions to check your progress.

Question 1 of 10

A student writing an essay about the importance of sleep for teenagers includes the following sentence: 'I remember one time I stayed up all night to study for a test, and I felt so tired the next day that I couldn't focus in any of my classes.' According to the provided content, what type of evidence is the student using?

All Questions (10)

A student writing an essay about the importance of sleep for teenagers includes the following sentence: 'I remember one time I stayed up all night to study for a test, and I felt so tired the next day that I couldn't focus in any of my classes.' According to the provided content, what type of evidence is the student using?

A) Statistic

B) Expert opinion

C) Personal experience

D) Experiment

Correct Answer: C

This question assesses the ability to identify types of evidence. The student is recounting a specific event from their own life, which is a form of personal experience or anecdote, as listed in Essential Knowledge 1.

A writer is making the claim that 'mandatory school uniforms improve student discipline.' Which of the following pieces of evidence would be most RELEVANT to support this claim?

A) A report on the rising cost of designer clothing for teenagers.

B) A study from a national educational research institute that correlates the implementation of uniform policies with a decrease in disciplinary infractions in schools.

C) A personal testimony from a parent who believes uniforms are more convenient for morning routines.

D) An article detailing the history of school uniforms in different countries.

Correct Answer: B

This question assesses the understanding of relevance. While other options relate to school uniforms, only option B directly connects the implementation of uniforms (the cause) to student discipline (the effect), making it the most relevant evidence for the specific claim.

An author argues that a new sugar tax will significantly reduce national obesity rates. As support, the author provides a single anecdote about one person who stopped drinking soda after a similar tax was implemented in their city and subsequently lost five pounds. The evidence in this argument is best described as lacking in:

A) Relevance, because the anecdote is not related to obesity.

B) Credibility, because the person's story is likely untrue.

C) Sufficiency, because a single personal story is not enough to support a broad, national claim.

D) Clarity, because the details of the tax are not explained.

Correct Answer: C

This question assesses the understanding of sufficiency. The claim is very broad ('national obesity rates'), while the evidence is extremely narrow (one person's experience). While relevant, this single anecdote is not sufficient to prove a nationwide trend.

A historian is writing a paper on the causes of the American Revolution and consults a 2018 biography of George Washington written by a university professor. How would this biography be classified as a source?

A) A primary source, because it is about a historical figure.

B) A secondary source, because it is a commentary and analysis of historical events and primary documents.

C) A primary source, because it was written by an expert.

D) A secondary source, because it was published recently.

Correct Answer: B

This question tests the distinction between primary and secondary sources. According to Essential Knowledge 3, secondary sources are commentaries or analyses of primary sources. A modern biography analyzes historical documents (letters, records, etc.) rather than being an original document from the time period itself.

In an argument advocating for stricter regulations on social media companies, a writer quotes a statement from the CEO of a major social media platform who claims the industry can regulate itself effectively. This evidence could be challenged on the grounds of its:

A) Relevance

B) Credibility

C) Sufficiency

D) Classification as a primary source

Correct Answer: B

This question assesses the understanding of credibility. The source, a CEO of a social media company, has a significant financial and professional interest in avoiding government regulation. This potential bias makes the source's testimony less credible, as they are not a neutral party.

Which of the following best describes the primary function of evidence within an argument?

A) To introduce new, unrelated topics for the reader to consider.

B) To make the writing longer and meet a required word count.

C) To support, validate, or prove the writer's claims.

D) To present the writer's personal feelings without justification.

Correct Answer: C

This question directly addresses Learning Objective 1. The fundamental role of evidence (facts, statistics, anecdotes, etc.) in an argument is to provide the backing and support necessary to convince the audience that the writer's claims are valid.

A writer is constructing an argument that their city should invest in more public parks. Which of the following represents the most effective combination of relevant, sufficient, and credible evidence to support this claim?

A) A single, emotional blog post from a resident about how much they enjoy the one existing park.

B) An interview with the CEO of a construction company that stands to profit from building the parks.

C) A collection of studies from urban planning journals, statistics on property value increases near parks in other cities, and testimonies from local pediatricians on the health benefits of outdoor play.

D) A detailed analysis of the types of trees that could be planted in the new parks, written by a landscape architect.

Correct Answer: C

This question requires students to evaluate evidence based on all three criteria. Option C provides a mix of credible sources (journals, pediatricians), relevant data (property values, health benefits), and a variety of evidence types, making it sufficient to support the claim. The other options are either insufficient (A), not credible (B), or not directly relevant to the core claim (D).

A student is researching the diary of Anne Frank for a school project. The diary itself is an example of what kind of source?

A) A secondary source

B) An expert opinion

C) A primary source

D) An analogy

Correct Answer: C

This is a direct application of Essential Knowledge 3. A diary is an original document created during the time period being studied, making it a primary source. It provides a firsthand account of events.

An effective argument requires that the evidence used must be relevant, sufficient, and credible. What is the primary purpose of the 'sufficiency' requirement?

A) To ensure the evidence directly relates to the claim being made.

B) To ensure the evidence comes from a trustworthy and unbiased source.

C) To ensure there is enough evidence to convincingly support the scope of the claim.

D) To ensure the evidence is an original document from the time period in question.

Correct Answer: C

This question asks for the definition and purpose of sufficiency. Sufficiency is about the quantity and weight of the evidence. A claim, especially a broad one, requires more than one or two pieces of evidence to be convincing; it needs an adequate amount to justify its scope.

A writer claims, 'The widespread adoption of electric vehicles is the most effective solution to air pollution in urban centers.' To support this, they cite a study funded entirely by a leading electric vehicle manufacturer. A critical reader should primarily question this evidence on the basis of its:

A) Sufficiency, as one study is never enough.

B) Relevance, as the study might not be about air pollution.

C) Credibility, due to the potential for bias from the funding source.

D) Status as a secondary source.

Correct Answer: C

This question focuses on identifying weaknesses in credibility. When a source of evidence is funded by an entity that has a strong vested interest in the outcome of the research (like an EV company funding a study on the benefits of EVs), its objectivity and credibility are questionable due to potential bias.