Diederick Stapel Was Found to Have Committed Scientific Fraud in the Fabricating

Diederick Stapel was found to have committed scientific fraud in the fabricating of data for many of his studies. What does his case illustrate about data falsification?

A) if fraudulent results are believable and understandable, the fraud may go undetected
B) most scientific fraud can be detected because the results will not be replicated when other scientists study the phenomenon
C) scientific fraud is often uncovered during the peer review process for journal publication
D) scientific fraud generally happens when researchers become mentally unbalanced