Answer:
B. it is fulfilling; in order to achieve a specific goal
Explanation:
Charles Horton Cooley is a well-known American sociologist that possessed this idea that people belong to primary groups because it is fullfilling and they belong to secondary groups in order to achieve a specific goal.
Because people what to do what he whated to do
According to my research, C (Crust) is the answer because that is the outermost layer.