Social Psychologist William McGuire Suggests That When an Audience Agrees

Social psychologist William McGuire suggests that when an audience agrees with you about a persuasive issue, you should inoculate them by increasing their resistance to counter-persuasion. You can do this by

A) giving the audience more reasons to support the position you share with them.
B) making jokes that demonstrates the absurdity of the opposition's arguments.
C) presenting the arguments of the opposition and showing audience members how to refute them.
D) attacking the opposition's credibility.
E) coming up with clever, demeaning slogans to characterize the opposition.