If You Do Something Contrary to Your Beliefs or Attitudes

If you do something contrary to your beliefs or attitudes, when will you experience the most cognitive dissonance?

A) when the amount of reward or justification for the action is low
B) when the amount of reward or justification for the action is at a medium level
C) when the amount of reward or justification for the action is high
D) when the amount of reward or justification for the action is unchanged