The Following Reaction Is at Equilibrium at One Atmosphere, in a Closed

The following reaction is at equilibrium at one atmosphere, in a closed container. Which, if any, of the following actions will decrease the total amount of CO₂ gas present at equilibrium?

A) adding N₂ gas to double the pressure
B) adding more solid NaOH
C) decreasing the volume of the container
D) removing half of the solid NaHCO₃
E) None of these choices is correct.