Sodium Bicarbonate, (NaHCO₃), in Solution Reacts with Hydrochloric Acid Solution

Sodium bicarbonate, (NaHCO₃) , in solution reacts with hydrochloric acid solution to produce aqueous sodium chloride, carbon dioxide gas, and water. The species being reduced in this reaction is Hint: Oxidation is a loss of electrons and reduction is a gain of electrons.

A) HCO₃^- (aq) .
B) CO₂(g) .
C) HCl(aq) .
D) Cl^-(aq) .
E) none of the above.