People's Reactions to Social Norm Violations Are Typically Negative

People's reactions to social norm violations are typically negative. From an evolutionary perspective, this may be because

A) when someone violates a norm, it may indicate that the person is an outsider, and, therefore, a potential threat.
B) biology is based on order rather than disorder, so unpredictable behavior is unnatural.
C) in the animal kingdom, it is more common to compete with others than to cooperate.
D) All of the above.