your parents?- Fine thank you.A. What isB. How isC. How areD. What are

问题补充：

--- your parents?

--- Fine, thank you.

A. What is

B. How is

C. How are

D. What are

答案：

A. What is

B. How is

(答案→)C. How are

D. What are

解析：本题回答与表示的是情况，对此提问的通常用how，本题问句主语为复数，故用are，故本题选C。