What is the physiologic advantage to hyperventilating at high altitude?
A. Increases the partial pressure of oxygen in inspired air
B. Creates respiratory alkalosis that facilitates oxygenhemoglobin binding
C. Decreases alveolar PACO2 and thereby increase alveolar PAO2
D. Opens, or recruits, more alveoli for gas exchange
E. Compensates for a primary metabolic acidosis
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