Officials Associated with International Track and Field Competitions Have Noted

Officials associated with international track and field competitions have noted an increase in the number of athletes who use a synthetic form of erythropoietin. Athletes use this drug because it:

A) decreases blood pressure so that they can be more focused and relaxed during a competition.
B) increases urine output so that they can shed weight just prior to an important competition.
C) increases the number of red blood cells so that they can increase their aerobic capacity for an event.
D) stimulates the release of ADH, which then goes on to cause an increase in the number of red blood cells. This helps athletes increase their aerobic capacity for an event.