The policeman asked the boy-------?

题目

The policeman asked the boy-------?
A where was his mother B where his mother C where his mother is D where is his mother

答案

应该说没有答案：
The policeman asked the boy
where his mother was才是正确的.
A语序错误；B没谓语；C时态错误；D时态语序均错误.（主句谓语是asked）