Buffer Solutions with the Component Concentrations Shown Below Were Prepared

Buffer solutions with the component concentrations shown below were prepared. Which of them should have the lowest pH?

A) [CH₃COOH] = 0.25 M, [CH₃COO⁻] = 0.25 M
B) [CH ₃COOH] = 0.75 M, [CH ₃COO ⁻] = 0.75 M
C) [CH ₃COOH] = 0.75 M, [CH ₃COO ⁻] = 0.25 M
D) [CH ₃COOH] = 0.25 M, [CH ₃COO ⁻] = 0.75 M
E) [CH ₃COOH] = 1.00 M, [CH ₃COO ⁻] = 1.00 M