C knows the answer by deducing D is not yelling out the answer.公仔箱論壇6 i# D) E0 I7 Z; k/ g; R1 L
That means D is not sure the answer by seeing one white and one black.tvb now,tvbnow,bttvb: p+ @7 u, v4 H! y$ e7 T
C saw B is wearing the white, hence he is wearing the black |