Sydney Is Generally a Dull Companion, but She Is Very

Multiple Choice

Sydney is generally a dull companion, but she is very entertaining when Dave is around. If Dave is an occasion setter,

A) he is necessary for entertainment.
B) it is Sydney that is entertaining, not Dave.
C) it is really Dave, not Sydney, who is entertaining.
D) neither Sydney nor Dave is entertaining individually, but they are entertaining when they are together.