What Mechanism Accounts for the Effects of Role-Playing on Attitudes

What mechanism accounts for the effects of role-playing on attitudes?

A) Role-playing affects attitudes because audience factors are more powerful than source factors.
B) Role-playing affects attitudes because cognitive dissonance accounts for persuasion better than self-perception theory does.
C) Role-playing affects attitudes because behaviour can influence attitudes.
D) Role-playing affects attitudes because elaboration is an important mechanism of persuasion.