Why Is the Presence of Carbonic Anhydrase in RBCs So

Why is the presence of carbonic anhydrase in RBCs so crucial for carbon dioxide transport?

A) Forms H₂CO_3, which is the major buffer for carbon dioxide.
B) Drives the hydrolysis reaction that forms HCO₃^-.
C) Forms H₂CO₃, which is the way the majority of carbon dioxide is transported.
D) Without its formation, carbon dioxide could not be excreted at the lungs.