75. For the sake of the logic and coherence of the essay, Paragraph 5 should be placed:
Your Answer is
Correct Answer is C
Explanation
P5 said that B's theory was criticized by other scientists, but it was later confirmed. P3 talks about B putting forward his own theory, and P4 talks about more research to confirm B's theory, so P5 should be placed between P3 and P4.