The Equilibrium Constant, K C , for the Reaction Below

The equilibrium constant, K c , for the reaction below is 1.2*10⁴⁵ at 25 C. CO (g) + 1 / 2 O₂(g) CO₂ (g) What can be stated about the relative equilibrium composition for this mixture?

A) The mixture contains predominantly CO.
B) The mixture contains predominantly O₂.
C) The mixture contains predominantly CO₂.
D) The mixture contains predominantly CO and O₂.
E) The mixture contains relatively equal amounts of CO, O₂ and CO₂.