The desire to perform a behavior due to promised rewards or threats of punishment involves

The discussion of AIDS prevention emphasized that

a. people are likely to overestimate their own personal risk of becoming HIV-positive. b. more than one-third of HIV-positive people say that they have not told their sexual partners about their HIV status. c. the abstinence-only programs on safe sex have demonstrated long-term success in reducing the transmission of HIV. d. most people feel comfortable about discussing condom use with potential sexual partners.

Research on the so-called "hedonic treadmill" has shown that both state lottery winners and paralysis victims ____, although paralysis victims ____

a. "get over it" and return to preexisting levels of happiness more quickly than might be expected; do not recover as quickly b. "get over it" and return to preexisting levels of happiness more quickly than might be expected; actually recover even more quickly c. take longer to "get over it" and return to preexisting levels of happiness than might be expected; take an especially long time to recover d. take longer to "get over it" and return to preexisting levels of happiness than might be expected; actually recover more quickly