The survival craft is manufactured with fire retardant（）.

A.at each alarm bell
B.at each alarm actuator
C.near all exits
D.on the station bill

A.nightstick
B.flashlight
C.passenger list showing assigned berths
D.A-I fire extinguisher

A.a helicopter carrying cargo only
B.a turbine-equipped helicopter
C.a Sikorsky
D.a helicopter carrying injured personnel in an emergency situation