As George Is Driving to Work One Day, He Finds

As George is driving to work one day, he finds himself singing the jingle from a radio commercial he heard the night before. For the remainder of the day, the jingle keeps "popping" back into his mind and he cannot seem to stop remembering it, no matter what he does. Technically, George is experiencing a(n) ________.

A) compulsion
B) hallucination
C) delusion
D) obsession