In a research experiment, participants are shown a series of drawings before seeing an ambiguous ...

In a research experiment, participants are shown a series of drawings before seeing an ambiguous picture that could be perceived as a rat or a man. Group 1 sees drawings of animals, while Group 2 sees drawings of humans. Perceptual set suggests which of the following results when participants are shown the ambiguous picture?
 
  a. Both groups will report seeing a man.
  b. Both groups will report seeing a rat.
  c. Group 1 will report seeing a rat, while Group 2 will report seeing a man.
  d. Group 1 will report seeing a man, while Group 2 will report seeing a rat. e. Neither group will see a rat or a man, since the picture is ambiguous.