GKFix MCQ Question

In the equilibrium HAc ⇌ H⁺ + Ac⁻, what effect does adding HCl have on [Ac⁻]?

• A. [Ac⁻] increases
• B. [Ac⁻] remains constant
• C. [Ac⁻] becomes zero
• D. [Ac⁻] decreases