If more than one raft is manned after the vessel has sunk，you should（）.

A.go in a different direction in search of land

B.spread out to increase the possibility of a search aircraft finding you

C.reduce the number of rafts by getting as many people as possible into as few rafts as possible

D.tie the rafts together and try to stay in a single group

自检键：将火灾报警控制器当前状态下各种报警信息清除，使控制器回到初始工作状态下（）