Before a scientific theory is accepted and supported, it has a) been tested by only one scientist. b) been published in scientific journals. c) been tested many times by different scientists. d) been approved by the international committee of scientists.

The correct answer will be option-C.

Explanation:

A scientific theory is a well-substantiated idea which explains any natural phenomenon in depth. The theory is the elaborate and explanatory form of a hypothesis which has to prove through experiments.

The theories are formed by the use of many earlier theories which explains the same natural issue like Theory of relativity by Einstein. Before the theory is accepted it must be supported by the experiments of the work of another scientist as well as earlier theories. It should be tested with other scientists working on the same issue.

Thus, Option-C is the correct answer.