Answer:
I would say
<em>"B. Exams show students' ability to take tests instead of their knowledge, so we should eliminate exams."</em>
Explanation:
<em>"A. Many students struggle with taking exams in school."</em> < This is not very elaborate, and is not a valid reason to eliminate testing.
<em>"C. Don't school exams just show how well students can take a test rather than what they really know?"</em> < This answer is informal, and is formatted as a question rather than a statement.
<em>"D. State tests are often a requirement in order to ensure state and federal funding for education."</em> < This is a good answer, with formal writing and a statement format, however, it is contradictory to the topic, and suggests that testing in schools should <em>not</em> be eliminated.
<u>Option 'B' tells us why exams are unnecessary using formal writing and a statement format. </u>
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Good luck!!