C knows the answer by deducing D is not yelling out the answer.tvb now,tvbnow,bttvb( _+ u: q: S1 @5 q# _3 z8 }2 X! Q
That means D is not sure the answer by seeing one white and one black.8 I9 M+ J( p+ y6 J5 u' T8 j3 D" l
C saw B is wearing the white, hence he is wearing the black |