Mort is trying to convince his parents that he should enroll at a university in another state, rather than the local university. He has made five strong points that support his position, but his parents are not yet convinced. Based on the research into factors that influence persuasion, at this point Mort should

a. add additional points that support his position, even if they are weaker arguments.
b. ask his parents to think about their decision for a few days.
c. repeat the arguments that he has already made.
d. play some soft background music while he and his parents discuss the issue some more.

C