Which of the Following Acids Should Be Used to Prepare $\times$

Multiple Choice

Which of the following acids should be used to prepare a buffer with a pH of 4.5?

A) HOC₆H₄OCOOH,K_a = 1.0 $\times$ 10^-3
B) C₆H₄(COOH) ₂,K_a = 2.9 $\times$ 10^-4
C) CH₃COOH,K_a = 1.8 $\times$ 10^-5
D) C₅H₅O₅COOH^-2,K_a = 4.0 $\times$ 10^-6
E) HBrO,K_a = 2.3 $\times$ 10^-9