A scientific theory is based on repeated investigations, Option B is correct.
Scientific theory is an explanation provided with regard an aspect of the natural phenomena that can be tested over and over again in order to be verified with the help of scientific method of observance and measurement resulting in evaluation of results and are evaluated o the basis of principals of science. A theory can imply an explanation that represents an unsubstantiated and speculative guess, whereas in science it describes an explanation that has been tested and widely accepted as valid.
