When One Compares Self-Reports from People Who Have Undergone Critical

When one compares self-reports from people who have undergone Critical Incident Stress Debriefing (CISD) with results from experiments conducted to assess the effectiveness of CISD, there is a discrepancy in that people report that

A) CISD is less effective than experiments show it to be.
B) CISD is too long, but experiments indicate is it not lengthy enough.
C) they do not enjoy it, but experiments indicate it is useful.
D) they are satisfied with CISD, but experiments show that it is not effective.