A Patient Has Severe Pneumonia,which Has Thickened the Respiratory Membrane

A patient has severe pneumonia,which has thickened the respiratory membrane.Despite oxygen therapy,he still has rapid respiration and feels as if he is not getting enough air.This is because

A) the oxygen increases the stimulation of the carotid and aortic bodies.
B) the oxygen stimulates the respiratory center to increase the respiratory rate.
C) his blood pH increased and stimulated an increase in his respiratory rate.
D) even though he is receiving enough oxygen,carbon dioxide and hydrogen ions accumulate in his blood and cause the respiratory rate to continue to increase.
E) oxygen cannot diffuse across the thickened membrane.

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