Hypothesis is a tentative explanation that can be tested and is falsifiable.
Option: A
Step-by-step explanation:
Hypothesis is a tentative explanation or presumption of a theory. It may be established as it is presumed or may be not that depends upon the scientific analysis and research. It is of two types. One is null hypothesis and another one is alternative hypothesis.
In null hypothesis what researcher presumes that established toto by following scientific research method. In alternative hypothesis presumption proved false and a new thing come our before researcher which also needs some scientific tests like student 't' test, 'f' test etc.