Given Ka of CH3COOH = 1.8 × 10⁻5, Kb of CH₃COO- = 5.6 × 10⁻10, determine the value of K for the reaction CH₃COO⁻(aq) + H₂O(ℓ) ⇌ OH-(aq) + CH₃COOH(aq).
A. 1.4 × 10⁻5
B. 3.2 × 10⁻6
C. 3.2 × 10⁻15
D. 1.4 × 10⁻15