GKFix MCQ Question

What is the correct expression for the solubility product of copper(II) sulfide (CuS)?

• A. Ksp = [Cu⁺][S²⁻]
• B. Ksp = [Cu²⁺]²[S²⁻]
• C. Ksp = [Cu⁺][S²⁻]²
• D. Ksp = [Cu²⁺][S²⁻]