Compared to Competition at Sea Level,distance-Running Performances Are Generally Not

Multiple Choice

Compared to competition at sea level,distance-running performances are generally not as good when conducted at high altitude.This is due to the

A) lower PO₂ in the inspired air.
B) greater reliance on creatine phosphate for energy.
C) greater reliance on anaerobic glycolysis for energy.
D) lower air density.