Suppose You Wanted to Convince Someone Who Is Opposed to Marijuana

Suppose you wanted to convince someone who is opposed to marijuana that it should be legalized. According to cognitive dissonance theory, what would be the best way to change that person's attitude?

A) Give him or her a substantial reward to openly endorse the legalization of marijuana.
B) Provide that person with as many convincing arguments and facts as possible in favor of marijuana until he or she changes his or her attitude.
C) Offer the person a small reward to openly endorse legalization but one just large enough to get him or her to endorse it.
D) Create the illusion that everyone else favors legalization so that disagreeing will make the individual feel uncomfortable.