Answer:
The correct answer is postpurchase cognitive dissonance.
Explanation:
Post-purchase dissonance comes from the psychological concept of cognitive dissonance created by Leon Festinger in 1957. Festinger's theory talks about the moment when we are about to make a decision, but we feel extremely confused and doubt that we have made the right decision.
In shopping, surely on more than one occasion we have experienced these feelings after paying.