C knows the answer by deducing D is not yelling out the answer.
- _4 u; N8 Q% utvb now,tvbnow,bttvbThat means D is not sure the answer by seeing one white and one black.
% g. W4 w- W K2 d3 V1 z6 f7 h5.39.217.76C saw B is wearing the white, hence he is wearing the black |