Which one is the correct ranking of buffer capacity of medium? ____.

A、organicmedium＞inorganicmedium＞inertmedium;
B、inorganicmedium＞inertmedium＞organicmedium;
C、inertmedium＞inorganicmedium＞organicmedium;
D、organicmedium＞inertmedium＞inorganicmedium