This coat is ____ .It's too small .Have you a larger size?—Yes,here you are.This one is _____.

This coat is ____ .It's too small .Have you a larger size?—Yes,here you are.This one is _____.
A.size medium;size small B.size medium; size large C.size small;size medium D.size large;size small.
原因,选A还是B