Which of the following expressions represents the equilibrium constant Kc for the reaction: aA + bB ⇌ cC + dD?

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

Answer: [C]^c[D]^d / [A]^a[B]^b


Additional Information: The equilibrium constant expression is the ratio of the concentrations of products to reactants, each raised to the power of their stoichiometric coefficients.