The Haber process is a method to produce ammonia from hydrogen and nitrogen gases. The reaction is:
N2(g) + 3 H2(g) <--> 2 NH3(g)
If hydrogen gas is added after the reaction has reached equilibrium, the reaction will:
Group of answer choices

A. Need more information

B. Stop. All of the nitrogen gas has been used up.

C. Shift to the left to produce more reactants

D. Shift to the right to produce more product