问题详情

From the first paragraph, we know that______
A．the thick fog made it difficult for the policemen to crack down Davison.
B．Davison ran so quickly that the policemen couldn"t find him in the fog.
C．Davison was very tricky, and escaped from the policemen.
D．Both B and C． 请帮忙给出正确答案和分析，谢谢！