After Darwin proposed his ideas about natural selection, scientists began trying to test his ideas in a variety of ways. Which of the following best explains why it was important that scientists did this?
A. They knew they would be left behind by the scientific community if they did not.
B. They needed to discredit Darwin as quickly as possible with contradictory evidence.
C. They were compelled to prove that this new idea was correct and Lamarck was wrong.
D. They had to see if this new idea fit the evidence they found in their experiments.