John Doesn't Care at All About the Legalization of Marijuana

John doesn't care at all about the legalization of marijuana, but in class he listened to a speech in favour of it. All else being equal, John is most likely to be persuaded if

A) the message contains short, cogent arguments.
B) the message contains information about the benefits of marijuana use that he can think about and evaluate.
C) the message is delivered by a fast talker.
D) none of the choices are correct.