Use the sentence to answer the question.

Study guides are essential for students to prepare for taking tests.

Which detail would be most relevant to the central idea in the sentence?
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1 point
Study guides identify possible details on test questions.
Study guides alert students to what they should know before taking a test.
Study guides give tips for studying.
Study guide provide hints about information that may appear on a test.

Study guides alert students to what they should know before taking a test.