Explain why head circles and arm circles are considered dangerous exercises

Responses will vary. A sample response follows:

Both head circles and arm circles involve stretching with motion. These stretching exercises risk serious injury to the muscles of the neck and shoulders if the motions are not trictly controlled. When the head goes back, it hyperextends the neck, which is dangerous; despite not involving bouncing, arm circles are a ballistic exercise and should not be performed.

i think the answer is d.