What Is the Main Difference Between Fads and Fashion

What is the main difference between fads and fashion?

A) Fads are only followed by the lower classes,while fashions tend to be restricted to the upper classes.
B) Fashions tend to be longer lasting and more widespread than fads.
C) Fads are followed by narrowly defined groups,while fashions are followed by more widely dispersed collectives.
D) Fads tend to "trickle down" from the upper classes,while fashions are adapted by everyone simultaneously.