C knows the answer by deducing D is not yelling out the answer.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。+ \0 |' x; F, o5 x9 C* u. z
That means D is not sure the answer by seeing one white and one black.tvb now,tvbnow,bttvb. N+ @9 c2 P: o( a8 ]% ~# [6 Q
C saw B is wearing the white, hence he is wearing the black |