Question

Anthropologists accept a theory when __________.
a. it has been tested and there is sufficient reason to accept it
b. it reaches consensus
c. it is proved
d. there are no other plausible explanations

Answer 1

The correct answer is A. 
It starts with a hypothesis, which is basically and educated guess.
Then it goes to a theory, which is proven with a bunch of data.
Then it goes to scientific law, which is when the theory works with centuries of data. Not even scientific laws are guaranteed to be true though.