选出适当的答语

--Is your birthday on May 17?

--______.

A. Yes, I am.

B. Yes, it isn't.

C. Yes, it is.

--____?

--My uncle is a farmer.

A. What does your uncle do

B. Who is your uncle

C. What is your uncle going to do

--My hat is red.

--______ is your hat?

A. Which　　B. What color    C. What