Answer:
D) cognitive dissonance theory
Step-by-step explanation:
The cognitive dissonance theory was introduced by Leon Festinger in 1957.
According to Festinger's theory, an individual strives for the inner psychological consistency to behave mentally in the world.
According to this theory, there is a propensity of an individual to strive or seek consistency between different cognitions including opinions, beliefs, etc. If an individual finds inconsistency between his or her behavior or attitude then it should be changed to avoid the dissonance.
In the question above, the given statement is explained in terms of cognitive dissonance theory.