Research Shows That the Enormous Sums of Money Spent by Tobacco

Research shows that the enormous sums of money spent by tobacco companies marketing cigarettes to teenagers:

A) are pretty much a waste because the marketing strategies have little effect on adolescents.
B) are unnecessary because adolescents would smoke even without the extensive advertising.
C) does not cause adolescents to start smoking; tobacco advertising is mainly effective at brand recognition.
D) is important in getting adolescents to stop smoking because these companies now are required to sponsor antismoking ads.