A first-year college student is extra careful to dress in outfits that are considered fashionable by others in her dormitory and to abide by rules for quiet study time. Her behavior is likely the result of

Normative social influence.

Explanation:

Normative social influence is a type of acceptance and provides one reason as to why people are going along with group behavior. People often act purely to gain approval from others, although they don't necessarily believe in what they do. This is a normative influence on society which leads to the desire to gain approval or escape disapproval. As per the question, the child's action in accordance with the other students reflects the Normative social influence.

of what agreement it does not show