C knows the answer by deducing D is not yelling out the answer.
& B$ A9 m" U8 L3 {# G4 J ~2 a! Q( Ztvb now,tvbnow,bttvbThat means D is not sure the answer by seeing one white and one black.
- }/ H( D/ L! K5 Q( K公仔箱論壇C saw B is wearing the white, hence he is wearing the black |