If the Reaction Quotient,Q,is Equal to K in a Gas

If the reaction quotient,Q,is equal to K in a gas phase reaction,then

A) the chemical system has reached equilibrium.
B) the temperature must be increased for the reaction to proceed in the forward direction.
C) the reaction will proceed in the forward direction until equilibrium is established.
D) the reaction will proceed in the backward direction until equilibrium is established.
E) the reaction will proceed in the direction that increases the number of gas phase particles.