Before agreeing to out at the local homeless shelter, sharon weighs the costs (e. g., getting up at dawn) and benefits (e. g., feeling good about herself) of doing so. this strategy is best explained by the self-perception theory. social-exchange theory. self-presentation theory. social comparison theory.

Option B

Explanation:

This theory was developed by sociologist George Homans which states that social behaviors are governed by the results of exchange processes going within a society. These exchange processes are meant to enhance the profits and reduce the cost so that every individual must get motivated to develop a social relationship. Mr. Homans said that until unless people get the reward that outweighs the risk and losses, only then people will establish a social relationships.  

Hence, option B is correct

the median of the data is 4.5.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.