“What have you done to your hair?” she said to her...

Câu hỏi: “What have you done to your hair?” she said to her son.

A. She asked her son what to do to his hair.

B. She wanted her son to know what he had done to his hair.

C. She wanted to know what did her son do to his hair.

D. She asked her son what he had done to his hair.