waha1ha1

C knows the answer by deducing D is not yelling out the answer.
- c- b! {& t* x: X7 ~- [* A公仔箱論壇That means D is not sure the answer by seeing one white and one black.5.39.217.770 u: g: B+ y9 b- ?, X; A% b
C saw B is wearing the white, hence he is wearing the black