1.) carrying a load of 100 pounds can reduce your car's fuel efficiency by a. 2% b. 20% c. 50% 2.) one of the major harmful things your car produces as it consumes gasoline is a. carbon dioxide b. water c. oil 3.) assessing and monitoring your fluid levels will you optimize your car's a. fuel mileage and longevity b. appearance and attractiveness c. traction and weight distribution

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.