When may a hypothesis be revised?
a - never
b - based on experimental data
c - after it has been proven to be correct
d - after at least one year from when it was first tested

(B) Based on experimental data

Explanation:

 We can revised the hypothesis based on the experimental data and it is also known as experimental hypotheses. The result of this hypotheses is that it significantly control the group that are mainly caused by the independent variable under the proper investigation process as compared to the null hypothesis.

The hypothesis is the set of rules utilized by researchers all together for their outcomes are added to the bigger assortment of learning inside the given field. Detailing a theory, researchers analysis and test it. In the event that the theory can't be valid, it is amended and experiences extra testing.