Which solution has the greatest buffering capacity?

A$)0\mathrm{.}540MN{H}_3$ and $0\mathrm{.}550MN{H}_{4}Cl$

B$)0\mathrm{.}335MN{H}_3$ and $0\mathrm{.}100MN{H}_{4}Cl$

C$)0\mathrm{.}085MN{H}_3$ and $0\mathrm{.}090MN{H}_{4}Cl$

D$)0\mathrm{.}200MN{H}_3$ and $0\mathrm{.}565MN{H}_{4}Cl$

E$)$ They are all buffer solutions and would all have the same capacity.