Question

A hypothesis _____.

Answer 1

The answer is c. bc it doesn't need to be tested

Answer 2

A hypothesis is essentially an "educated guess". 
This just means that it doesn't have to be true and doesn't really have to be proven correctly in order to call it an experiment.
So with that info B,C, and D can be crossed out.

The answer is:
A. must be tested

If you make a hypothesis, you usually have to test it to see if you were right.