When Considering the Effect of a Catalyst on a System

When considering the effect of a catalyst on a system to which Le Chatelier's Principle can be applied, which of the following is true?

A) Addition of a catalyst has absolutely no effect on the reaction.
B) Addition of a catalyst speeds up the forward reaction.
C) Addition of a catalyst speeds up the reverse reaction.
D) Addition of a catalyst speeds up both the forward and reverse reaction by the same amount.