--Selma looks very pretty tonight.--Yes,she always looks her best in ____of that color.

问题描述:

--Selma looks very pretty tonight.--Yes,she always looks her best in ____of that color.
A.the dress B.dress C.a dress D.that dress

C.a dress如何理解需要详解in a dress of that color 穿着那种颜色的一件衣服。