You are sitting on a stool when suddenly you lean back and fall off the stool, hitting the back of your head on the floor. You "see stars" as you try to sit back up. This sensation of "seeing stars" occurred because

a. neurons in your occipital lobe were stimulated.
b. your eyes were jarred to the extent stars were seen.
c. neurons in your retina were stimulated.
d. neurons in your hypothalamus were stimulated.

A