Which usually will allow one group of scientists to repeat an experiment performed by another group of scientists?

Hi!

The answer to this question will be D, "knowledge of the entire investigation carried out by the original group of scientists". A group of scientists need to know exactly what went on before in the experiment so they can replicate it without making any mistakes. If they do something different than the first group, it's not a valid replication, because their results will be different.

Hope this helps!