You Are Asked to Go into the Lab and Prepare

You are asked to go into the lab and prepare an acetic acid - sodium acetate buffer solution with a pH of 4.00 ± 0.02.What molar ratio of CH₃COOH to CH₃COONa should be used?

A) 0.18
B) 0.84
C) 1.19
D) 5.50
E) 0.10