Which statement best describes scientists who contributed to the current
body of scientific knowledge?

As statements are not provided, let's have a look at scientific knowledge generally.

Explanation:

A piece of scientific knowledge will be considered to be true and authentic if it is supported by a number of testable experiments which gave the same supporting result again and again. Experiments performed by such scientists will be viable and will contribute to the current body of scientific knowledge.

On the other hand, scientific knowledge that is not supported by experiments that are correct will not be of much importance.