Why can some drugs be bought only with a prescription

What is one way that vance might have been able to prevent this injury?

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells

Someone with my pe hw i need it for tomorrow