Your weighs about three pounds, feels like soft butter, and is the command center of your body.
a. brain
b. pituitary gland
c. heart
d. liver

Brain is a command center so this is the most likely answer

Pituitary gland is also a command center but is far too small to weigh 3 lb

Hearts main function is to pump blood and isn't a command centre

Liver creates digestive things and helps with blood

So your answer is A. brain

It would be 23 beats per second