Overjustification is most likely to occur when

a. Cindy is given a trophy for riding her bicycle.
b. Jan is punished for refusing to set the dinner table.
c. Marcia is asked out to her senior prom.
d. Bobby walks his dog, Tiger.
e. Peter receives a trip to Hawaii for being named Salesman of the Year.

a. Cindy is given a trophy for riding her bicycle.