Injury prevention and first aid?

when faced with an emergency situation, the first rule to remember is to..
(?)A. stay calm and keep everyong around you calm..
C. keep the rest of the class exercising.
D. look up an emergency phone number

fitness instructors can advoid burnout by..

A. teaching three to four classes a day.
B. allways doing a full workout each time they teach.
C.advoiding the temptation to lie flat on their baacks for any great lengeth of time.
(?)D. using the services of a chiropractor and/or massage therapist.

which of the following statements describes "long term" aerobics students?

A. they arent prone to minor injuries .
B. Long-term students need not worry about preventative safety techniques.
(?)C. They risk injury even though they may be in good shape.
D. Long-term students reduce their occurrences of microtrauma over time

14. In order to improve your body symmetry, it's important to

A. strive for the maximum number of repetitions you can achieve without fatigue.
B. try to keep the muscles contracted as tightly as possible.
(?)C. recognize and strengthen the weaker areas of the body.
D. build endurance.

15. At what point should an injured student see a sports injury professional?

(?) A. When the pain doesn't subside after three to five days of rest
B. As soon as the incident occurs and pain is identified
C. As soon as the initial pain first stops
D. Immediately after an out-of-shape exerciser experiences discomfort

16. What is the most common injury for both aerobics instructors and students?

(?) A. Heel bruises
B. Neck sprains
C. Shin splints
D. Burnout and fatigue

I agree with all your answers marked with a "(?)", except for the last one... 20.

As for 20. (the last one), I'm not exactly sure which answer is correct.

Hope this helps!!! =)