Why Would You Predict That the Blood Carbon Dioxide Levels

Multiple Choice

Why would you predict that the blood carbon dioxide levels in a pregnant woman would fall?

A) She has trouble breathing due to the expanding uterus.
B) The fetus is removing carbon dioxide from her blood.
C) The maternal oxygen levels are also falling.
D) Pregnancy creates a favorable concentration gradient between the fetal and maternal blood.
E) The bronchial tubes relax.