Which Behavior Is Most Motivated by Physiological Factors

Which behavior is most motivated by physiological factors?

A) turning down an offer from an extremely prestigious university because your parents attended good old State U
B) adding and removing clothes so as to maintain a comfortable body temperature
C) fulfilling a request made by your employer in the hope that she will return the favor
D) donating clothes, canned goods, and money to charitable organizations because you have plenty