Select the correct K expression for the following reaction: 3 A(aq) + B(s) = 2 Claq) + D(aq)
a. K = 2[C][D] / 3[A]
b. K = [C]^2[D] / [A]^3[B]
c. K =[A]^3 / [C]^2[D]
d. K = [C]^2[D] / [A]^3