Explaining Unpleasant Behavior by Labeling People "Crazy" or "Sadistic

Explaining unpleasant behavior by labeling people "crazy" or "sadistic":

A) is useful because it allows us to develop tests to help classify people.
B) is dangerous because it makes these people angry and violent.
C) is useful because it warns the general public to watch out for certain people.
D) is dangerous if it causes us to forget about situational factors that could cause us to engage in unpleasant behaviors.