Refer to the Figure

Refer to the figure. This capillary could be in a(n) _______.This is apparent because _______.

A) human intestine; carbon dioxide is diffusing from the tissue labeled 1 into the plasma of the capillary
B) human intestine; CO₂ is binding with hemoglobin and remaining in the red blood cell
C) human lung; the enzyme present at label 2 is catalyzing the reaction in which carbon dioxide and water are combined to form bicarbonate
D) human lung; the reaction at label 2 is being catalyzed by the enzyme called carbon dioxide hydrase
E) insect air sac; bicarbonate ions are entering the plasma in exchange for chloride ions