The PH of Blood Is Maintained at 7

Multiple Choice

The pH of blood is maintained at 7.35-7.45 by the following buffer system:
The H₂CO₃ is produced by the reaction of CO₂ with water according to the equation:
When one exercises, there is increased cellular output of CO₂. What effect will this have on the pH of the blood if the excess CO₂ is not eliminated?

A) The pH will increase.
B) The pH will decrease.
C) The pH will remain the same.
D) It is impossible to predict the effect.