National public radio (npr) often holds fund drives to raise money for their radio stations. they frequently offer "prizes" for people who donate a certain amount of money. for example, they might offer a cd for those who donate at least $50 to the station. it's not clear whether this actually increases donations. what can we say about this situation? the money functions as a reinforcer for getting a cd. the cd's function as a reinforcer for donating money. the money functions as a reward for getting a cd. the cd's function as a reward for donating money.