Use the Following Information to Answer the Next Questions

Use the following information to answer the next questions.
Atmospheric pressure at sea level is equal to a column of 760 mm Hg.
Oxygen makes up 21% of the atmosphere by volume.
-If the partial pressure of CO2 at sea level is approximately 0.23 mm Hg, how does this influence gas exchange in terrestrial animals?

A) the higher pressure of oxygen causes the lung surface to extract oxygen and give up carbon dioxide
B) the lower pressure of oxygen causes the lung surface to extract oxygen and give up carbon dioxide
C) the low concentration of carbon dioxide causes the oxygen to move across the lung surface
D) the low concentration of carbon dioxide causes the carbon dioxide to exert pressure on the inner lung surface
E) since the concentration of oxygen is lower in water, the moist surface of the lung extracts less carbon dioxide