In the Study by Festinger and Carlsmith (1959) in Which

In the study by Festinger and Carlsmith (1959) in which subjects were asked to explain that a boring task was interesting, which participants later said that they enjoyed the task anyway?

A) control group
B) all experimental participants
C) participants in the $20 condition (high reward)
D) both experimental and control participants
E) participants in the $1 condition (low reward)