GKFix MCQ Question

What is the equilibrium constant for the reaction 2CO(g) + O2(g) ⇌ 2CO2(g)?

• A. [CO]^2[O2] / [CO2]^2
• B. [CO2] / ([CO]^2[O2])
• C. [CO2]^2 / ([CO]^2[O2])
• D. [CO]^2 / ([CO2]^2[O2])