Which of the Following Is Probably an Example of the Overjustification

Which of the following is probably an example of the overjustification effect?

A) Professional tennis players do not like to play tennis in their spare time.
B) Workers who are promised a bonus for increasing their productivity work harder than do workers who are not offered a bonus.
C) Children who are punished for touching the stove are more likely to quit touching it if the parents explain why they punished the children.
D) People who are trying to lose weight but who have just violated their diet are likely to overeat during the later meals of the day as well.