What might cause scientists to change a scientific theory?
a. some people disagree with it
b. it covers too broad a topic
c. new evidence contradicts it
d. it is too old

The correct answer will be option-C.

Explanation:

A scientific theory is a well-substantiated prediction or an idea which explains the natural process or phenomenon in depth. A scientific theory is made on the basis of facts and evidence of the previous research and theories.

The scientific theory is the elaborate explanation of any hypothesis which could be changed and modified with development in science. The most possible reason for a theory to be changed is that new evidence of new research can contradict the previous facts.

Thus, Option-C is the correct answer.

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