waha1ha1

C knows the answer by deducing D is not yelling out the answer.5.39.217.77:8898) R% p( ~3 h0 E2 C/ q( B. u; K" v- B) ^( F
That means D is not sure the answer by seeing one white and one black.
9 d* j) X- s0 u: h) }8 H公仔箱論壇C saw B is wearing the white, hence he is wearing the black