PLEASE HELP ASAP
When blood oxygen level drops due to exercise; what effect does this have on the body?
A. You shiver
B. The friction caused by the muscles shivering warms the body.
C. Oxygen is taken in more quickly from the lungs and pumped more quickly through the blood to get to the muscles and replenish the oxygen level.
D.Excess body heat evaporates the sweat, which has a cooling effect on the body.