before a scientific theory is accepted and supported, it has\na been tested by only one scientist.\nb been…

before a scientific theory is accepted and supported, it has\na been tested by only one scientist.\nb been published in scientific journals.\nc been tested many times by different scientists.\nd been approved by the international committee of scientists.
Answer
Brief Explanations:
For a scientific theory to be accepted, it must undergo repeated testing by multiple scientists to verify its validity and reliability. Publication in journals is part of the process but not the sole - determining factor. There is no such thing as a single - scientist test or an "International Committee of Scientists" approval for acceptance.
Answer:
C. been tested many times by different scientists.