The answer is 2 because its the outside number and not in the parentheses
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:
<span>a) Discoveries are more credible when they are independently verified</span>
tonsils are large lymphatic nodules h are located in the walls of the pharynx