Answer:
The correct answer would be option D, 5 to 10 minutes.
Explanation:
Warm up and cool down are the two periods in the exercise that have to be included when you do a workout. Warm up is the starting exercises of mild intensity in which the body prepares itself for the upcoming intense workout. Some simple exercises are done before starting the regular exercise. Warm up may include mild jumping, mild jumping jacks, etc. Warm up basically increases the blood flow to the muscles and prepare the muscles for the intense workout session. On the other hand, cool down is done after completing the regular intense workout session in order to relax the muscles of the body. Cool down may include mild walking or some stretches to relax the body muscles. Both warm up and cool down take 5 to 10 minutes each.