—Nobody knows he was after he graduated from Beijing University.

问题描述:

—Nobody knows he was after he graduated from Beijing University.
—But I was once told he was a doctor working in a far-away village.
A.what B.who C.where D.how

C.
没人知道他毕业后去了哪里.所以用 where...
我听说他曾经在一个偏远的山村做过医生.
其他选项解释不通.