There are hundreds of major and sub-fields of science. Who decides which field of science is officially a sub-field of another field?

Select one:

a. There is a board of scientists who decide.

b. No one. Over time scientists generally agree as to which field is a sub-field of another. But many fields are shared by two or more major fields.

c. Wikipedia will determine that.

The subject of science is very broad. With that being said, I think there is no official regulatory board that decides the branches of science. Scientific developments are products of joined efforts of different scientists. These scientists could rebuke another's work provided there is evidence. As long as the theory is generally accepted by the scientists and no one rebukes it effectively, then it is a generally accepted fact and everyone adapts it.

Hence, the answer is B.