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