Ammonia Is Synthesized Industrially by the Reaction of Nitrogen and Hydrogen

Ammonia is synthesized industrially by the reaction of nitrogen and hydrogen in the presence of an iron catalyst according to the reaction equation below.What effect would removing the iron catalyst have on this reaction?

A) The reaction would shift to the right, producing more ammonia.
B) The reaction rate would increase.
C) The reaction would shift to the left, and consume ammonia.
D) The reaction rate would decrease.
E) There would be no effect on the reaction since Fe is not consumed in the reaction.