When Kelly Complains That the Term "Hookup" Is Ambiguous, What

When Kelly complains that the term "hookup" is ambiguous, what is he saying?

A) That we don't have a workable definition of "hookup"
B) That the term "hookup" doesn't tell you what people are actually doing together
C) That it isn't clear how to distinguish "hookups" from "one night stands"
D) That hookups have made it hard to tell when people are in relationships
E) All of the above