What effect would hypercapnia and metabolic acidemia have on the pulmonary vascular system?

a. Metabolic acidemia would cause vasodilation and hypercapnia would cause vasoconstriction
b. Both would cause vasodilation
c. Both would cause vasoconstriction
d. Hypercapnia would cause vasoconstriction but metabolic acidemia would not affect the pulmonary vascular system

c. Both would cause vasoconstriction