GKFix MCQ Question

What is the correct equilibrium expression for the reaction: CH3COOH ⇌ CH3COO⁻ + H⁺?

• A. K = [CH3COOH] / ([CH3COO⁻][H⁺])
• B. K = [CH3COO⁻] / [H⁺]
• C. K = [CH3COO⁻][H⁺] / [CH3COOH]
• D. K = [CH3COO⁻]² / [CH3COOH]