The Criterion That a Particular Behaviour Be Atypical or Not

The criterion that a particular behaviour be atypical or not culturally expected is insufficient to define abnormality because

A) behaviour that occurs infrequently is considered abnormal in every culture.
B) the atypical behaviour must also cause harm or impairment to be considered abnormal.
C) behaviours vary very little from one individual to another within each culture.
D) many people behave in ways that deviate from the average, but this doesn't mean that they have a disorder.