Of the Following Solutions, Which Has the Greatest Buffering Capacity

Multiple Choice

Of the following solutions, which has the greatest buffering capacity?

A) 0.521 M HC₂H₃O₂ and 0.217 M NaC₂H₃O₂
B) 0.821 M HC₂H₃O₂ and 0.713 M NaC₂H₃O₂
C) 0.365M HC₂H₃O₂ and 0.497 M NaC₂H₃O₂
D) 0.121 M HC₂H₃O₂ and 0.116 M NaC₂H₃O₂