单选题The patrolman，while on duty on a passenger vessel，must have in his possession a(n)（）.AnightstickBflashlightCpassenger list showing assigned berthsDA-I fire extinguisher
单选题
The patrolman，while on duty on a passenger vessel，must have in his possession a(n)（）.
A
nightstick
B
flashlight
C
passenger list showing assigned berths
D
A-I fire extinguisher
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