If you were being assisted by an icebreaker and he sent you the single letter Q，he would be telling you（）.

A.that he has his engines in reverse

B.that he is shortening the distance between vessels

C.to shorten the distance between vessels

D.that his vessel is healthy

A县某公司的业务员甲、乙一起到B县出差，在B县的宾馆内认识了C县某公司的业务员丙、丁，四人便在房间内赌博，被人举报。派出所出警时，被出来买烟的甲、乙看见，两人打电话通知丙、丁后，先行逃到了公司设在D县的营销点，丙、丁则被派出所出警人员抓到，这案件应由（）办理。

A、A县公安局

B、B县公安局

C、C县公安局

D、D县公安局