Multi-select problem: How does the next paragraph end?

How to prepare for a military physical screening test
Be sure to stretch.
Stretching is the most important part of exercise. If you do not stretch your muscles you could cause serious damage to them.

Available options: (A). Stretching before the test actually proves your fitness level. Before doing any physical preparation, be sure to : Have some fun. (B). Do a regular stretching routine where you stretch every muscle group of your body from your shoulder to your hand. Do stretches that you can do while sitting in a chair. (C). Work on improving your push-ups. Your present physical capability will determine how many repetitions (push-ups) you will do in each set (one setting). (D). To do this : Touch a muscle and hold for 30 seconds. If you notice any tension, stop the amount of stretching.
(C).