posted by Gaby .
What is the best explanation for why scientific theories are modified?
A)Theories more than ten years old are usually out of date.
B)Scientists want to prove that the work of other scientists is wrong.
C)New evidence that supports a revision prompts scientists to modify the earlier theories.
D)So much information is available today that it is harder to focus research and disprove theories.
I believe the answer is C but i'm not sure.