Which phrases accurately characterize sexually transmitted infections (stis)

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.

An example of maslow's need for safety is reaching goals through self-discipline

What else happens in your cardiovascular system in response to your sympathetic nervous system? why might your blood vessels need to expand to accommodate this?