For the reaction 4A ⇌ B + 2C, what is the expression for Kc?

A. [B][C]^2 / [A]^4
B. [B] / [A]^4
C. [C] / [A]^4
D. [B][C] / [A]^4

Answer: [B][C]^2 / [A]^4


Additional Information: Kc is calculated as the concentrations of products divided by the concentrations of reactants raised to their stoichiometric coefficients.