Does abstinence protect against stis?

sorry if you think this is inappropriate, but i need this for my homework it's just this one question and this is the best website i can find for the answer.

According to the article, when our sleep/wake cycle breaks down, we are at an increased risk for all but which select one: a. respiratory illnesses b. dementia c. diabetes d. heart disease

What should be changed to make the following sentence true? "the stress model suggests that people with a predisposition for a disorder are more likely to develop the disorder when faced with stress."

What is the longest you should ice the injured area at one time? a. 10-20 minutes b. 30-60 minutes c. 1-2 hours d. as long as you want