Determination of Equilibrium Concentrations in a Reaction

Consider the following reaction, which has reached chemical equilibrium:

A(g) + B(g) <=> C(g) + D(g)

The equilibrium constant, K_c, for this reaction at a certain temperature is given as K_c = 50. If the concentration of A at equilibrium is 0.2 M, the concentration of B is 0.1 M, and the concentrations of C and D need to be determined, which of the following statements is true regarding the equilibrium concentrations of C and D?