A Laboratory Rat Has an Electrode Implanted in Its Brain

A laboratory rat has an electrode implanted in its brain. By pressing a metal bar in its cage, the animal can activate the electrode. Which of the following is most likely to be true?

A) If the animal presses the bar repeatedly, then the electrode is probably in an area associated with appetitive motivation.
B) If the animal presses the bar once, then never touches it again, then the electrode is probably in an area associated with aversive motivation.
C) Such an experiment has no relevance to emotional states in humans or human behavior.
D) Both if the animal presses the bar repeatedly, then the electrode is probably in an area associated with appetitive motivation and if the animal presses the bar once, then never touches it again, then the electrode is probably in an area associated with aversive motivation are correct.
E) All of the choices are correct.