It Is Difficult to Generate a Precise List of Deviant

It is difficult to generate a precise list of deviant behaviours and appearances for all but one of the following reasons.

A) Very few things can be classified as 'deviant'.
B) Deviance exists only in relation to norms in effect at a particular time and place.
C) Something that some group considers deviant may not be considered deviant by another.
D) Something considered deviant at one time and place may not be considered deviant at another.