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i think its b im not sure dont do b wait till someone else sees it

Explanation:

B. "Scientist theories are based on large amounts of evidence."

I hope this helps you! :D

Explanation:

Theories are put into action once large amounts of research and evidence can be provided to prove a theory. Scientists especially need lots of evidence in order to prove a point and their theory.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.