C knows the answer by deducing D is not yelling out the answer.0 L+ w/ x. g3 A5 E" i/ a! O+ A5 q
That means D is not sure the answer by seeing one white and one black.
' B& Q% a$ R/ z- [" C( w4 Ttvb now,tvbnow,bttvbC saw B is wearing the white, hence he is wearing the black |