Which of the Following Is the Best Example of Cognitive

Which of the following is the best example of cognitive dissonance?

A) John has been shopping for a new television set,but has not yet made a purchase because he is having trouble deciding which brand to buy.
B) Julie decided to eat at a restaurant she previously avoided after learning that several movie stars she admires endorse the restaurant.
C) Marquetto is torn between going to the movies with friends or staying home and studying for an exam tomorrow.
D) Rico just bought an expensive stereo system and is already worried that he could have found a better deal if he had shopped more carefully.