Dr. Mynard noticed that the rabbits in his current study were no longer engaging in food seeking behavior and showed little interest copulation. Dr. Mynard has been using electrical stimulation to study various parts of the rabbits' brains. It is likely that Dr. Mynard damaged the rabbits' _________ located in the basal ganglia.
a. medial hypothalamus
b. nucleus accumbens
c. fornix
d. hippocampal formation