GKFix MCQ Question

What is the correct expression for Kc for the reaction: aA + bB ⇌ cC + dD?

• A. [A]^a [B]^b / [C]^c [D]^d
• B. [C]^a [D]^b / [A]^c [B]^d
• C. [C]^c [D]^d / [A]^a [B]^b
• D. [A]^c [B]^d / [C]^a [D]^b