Answer:
B. conformity
Explanation:
Conformity is a term in psychology that describes the tendency of a person(s) to adopt the behaviour of the people around them or of the people in a group they belong to.
Monica adopted the behaviour of her group of friends.
Labelling theory postulates that individuals may adopt the characteristics of the labels people use to describe them and this may shape their identity.
Differential association theory states that people learn how to become criminals by interacting with people.