Answer:
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