A Laboratory Rat Has an Electrode Implanted in Its Brain

Multiple Choice

A laboratory rat has an electrode implanted in its brain.By pressing a metal bar in its cage,the animal can activate the electrode.You are analyzing the data from the most recent experiment day and find that the rat pressed the bar over and over again.The rat did not even eat during the experimental period because it was too busy pressing the bar.  In which location is the electrode likely to be implanted?

A) Frontal lobe
B) Mesolimbic system
C) Hypothalamus
D) Occipital lobe
E) All of the choices are possible locations of the electrode.