11. how does regular exercise to reduce the effects of mental stress? a. regular exercise has been shown to reduce the physical effects of stress. b. regular exercise gives you better mental discipline, so you're better able to ignore stress. c. people who regularly exercise are happy people and are fun to be around. d. regular exercise gets you away from the home or office and away from stress. student bincorrect reference: section 1.2

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.