Other Than Perceiving the Competing Realities in a Joke, What

Other than perceiving the competing realities in a joke, what else is usually involved in "getting"and enjoying a joke?

A) The joke must be universally funny.
B) The joke must be simple.
C) The audience must fill in missing information on their own.
D) The joke teller must provide more and more information until it is understood.
E) The joke teller must avoid hidden meanings.