C knows the answer by deducing D is not yelling out the answer.
. f2 d+ D& t0 O! z& A# q; q6 jThat means D is not sure the answer by seeing one white and one black.
9 K, \# a5 P8 z8 G0 J" D! B+ xtvb now,tvbnow,bttvbC saw B is wearing the white, hence he is wearing the black |