Carbonic Anhydrase (CA), an Enzyme Widely Present in Plant and Animal

Carbonic anhydrase (CA) , an enzyme widely present in plant and animal tissues, catalyzes the reaction:
This reaction is important for the maintenance of acid base balance in blood and other tissues and to help transport CO₂ out of tissues; without a catalyst, this reaction would not occur at rates that could maintain homeostasis. In the figure below, which line(s) represents the reaction catalyzed by carbonic anhydrase?

A) Line B; the activation energy has been lowered.
B) Line A; the activation energy increased.
C) Lines A and B; product is shown for both lines.
D) Line A; more energy is supplied.
E) Either, as the free energy is the same for both.