Paulo Has Always Believed That Tuition for Higher Education Should

Paulo has always believed that tuition for higher education should be free. However, he has just changed his attitude to be more positive about paying for his education. In order to determine whether this change was the result of cognitive dissonance or self-perception, what would you look for?

A) if Paulo's attitude was extreme to begin with
B) if Paulo was paid a lot of money to express the new attitude
C) if Paulo experienced physiological arousal
D) if Paulo was exposed to a peripheral route
E) if Paulo was exposed to a central route