What Would Happen If More Formic Acid (HCO₂H) Was Added

Multiple Choice

What would happen if more formic acid (HCO₂H) was added to the following solution at equilibrium?
HCO₂H(aq) + H₂O(l) H₃O⁺(aq) + HCO₂^-(aq)

A) [H₂O] should increase.
B) [H₃O⁺] and [HCO₂^-] should both increase.
C) [H₃O⁺] and [HCO₂^-] should both decrease.
D) [H₃O⁺] should increase but [HCO₂^-] should decrease.
E) [H₃O⁺] should decrease but [HCO₂^-] should increase.