Final answer:
Wearing formal clothes in an informal setting does not violate a formal norm, which is an established written rule, but rather breaches an informal norm related to social dress codes.
Step-by-step explanation:
Wearing formal clothes in an informal setting could be seen as a minor breach of social norms; however, it does not necessarily mean that a formal norm has been violated. Formal norms are established, written rules such as laws or official codes of conduct, whereas informal norms are unwritten standards of behavior that are understood and followed by members of a society. When someone wears formal attire to a casual event, they are more likely breaching an informal norm related to appropriate dress code rather than violating a formal norm. Therefore, the answer to the student's question is B) False.