What is the primary advantage of multiple researchers obtaining the same result? a) discoveries are more credible when they are independently verified b) discoveries are less likely to be forgotten years later c) discoveries are more likely to be disproved by addition

If multiple researches obtained the same result, it means that the test is highly repeatable ! Highly repeatable results are always very welcomes, because people believe that they have a high validity and high credibility.

So the correct answer is:
a) Discoveries are more credible when they are independently verified