The Research of Pennebaker Demonstrated That Discussing Traumatic Events Can

The research of Pennebaker demonstrated that discussing traumatic events can lead to improved immune system function is considered somewhat controversial because:

A) people are forced to discuss traumatic events against their wills and this is unethical research practice.
B) all of his studies have relied exclusively on self-report measures that may be biased.
C) there may be circumstances where such emotional "purging" is not helpful or may even be harmful.
D) Pennebaker has failed to control for the effect of neuroticism on this association.