— is your ruler?—It’s blue.A. WhatB. What’s colorC. HowD. What color

问题补充：

— is your ruler?

—It’s blue.

A. What

B. What’s color

C. How

D. What color

答案：

A. What

B. What’s color

C. How

(答案→)D. What color

解析：根据回答内容，本题在询问颜色用What color