DrAllenby Has Implanted Electrodes in the Brain of a Cat

Multiple Choice

Dr.Allenby has implanted electrodes in the brain of a cat.By passing differing electrical frequencies through the wires Dr.Allenby finds that he can cause the cat to fall into a deep sleep, or awaken suddenly.Based on this information, it is most likely that the electrodes have been implanted in the cat's:

A) cerebellum
B) hypothalamus
C) thalamus
D) reticular formation