What Is the Value of the Concentration Equilibrium Constant, K

What is the value of the concentration equilibrium constant, K c (@1000 K) , for the following reaction?
CO (g) + Cl₂ (g) COCl₂ (g) K p = 3.9*10^{- 2} (@ 1000 K)

A) K _c = 4.75×10 ^{- 4}
B) K _c = 3.9×10 ^{- 2}
C) K _c = 0.312
D) K _c = 3.20
E) K _c = 324