Once You've Made a Choice, It Can Be Irksome to Notice

Once you've made a choice, it can be irksome to notice something positive about a rejected alternative, such as noticing the shirt you rejected has nicer buttons that the shirt you did buy. Thus, to minimize this cognitive dissonance resulting from buyer's regret, you must

A) use groupthink to rationalize your decision.
B) develop a self-handicapping strategy regarding your rejected alternatives.
C) use the defense mechanisms of projection and suppression.
D) emphasize positive aspects of what you chose and downgrade the other alternatives.