In a Study on Posthypnotic Suggestion and Hypnosis, Researchers Instructed

In a study on posthypnotic suggestion and hypnosis, researchers instructed participants to send postcards weekly to the researchers. Half of the participants were hypnotized and received this instruction as a posthypnotic suggestion. The other half of participants were not hypnotized and received this instruction as a request for a favor. The results of that study found that _____ participants found the task required _____ effort.

A) the hypnotized; great
B) the nonhypnotized; great
C) both groups of; great
D) both groups of; little