Research on cognitive dissonance suggests that in many cases

A) you can change people's attitudes by first changing their behavior.
B) people with major differences in personality find each other attractive.
C) a group that discusses some issue moves toward a more extreme opinion.
D) prejudiced people fail to recognize their own prejudices.

Cognitive Dissonance

Cognitive dissonance is a psychological concept describing the discomfort experienced when holding contradictory beliefs, values, or attitudes, typically leading to a change in one of them to reduce the dissonance.

Attitudes

are psychological tendencies expressed by evaluating a particular entity with some degree of favor or disfavor.

Behavior

The actions or reactions of an object or organism, usually in relation to the environment, which can be observed and measured.