Consider the Following Reaction at Equilibrium

Consider the following reaction at equilibrium. What effect will adding He gas have on the system? 2KClO₃(s) ⇌ 2KCl(s) + 3O₂(g)

A) No effect will be observed since He is inert and is not included in the equilibrium expression.
B) The equilibrium constant will decrease.
C) The reaction will shift in the direction of reactants.
D) The equilibrium constant will increase.
E) The reaction will shift in the direction of products.