Which Factor Below Would Reduce the Amount of Oxygen Transfer

Multiple Choice

Which factor below would reduce the amount of oxygen transfer across the respiratory membrane?

A) a higher partial pressure of oxygen in the atmosphere.
B) an abnormally high partial pressure of carbon dioxide in the atmosphere.
C) a reduced partial pressure of carbon dioxide in the atmosphere.
D) a low pulmonary capillary, partial pressure of oxygen.
E) none of these answers.