单选题You must ensure that lifesaving equipment is（）.ALocked upBReadily accessible for useCInaccessible to passengersDOn the topmost deck of the vessel at all times
单选题
You must ensure that lifesaving equipment is（）.
A
Locked up
B
Readily accessible for use
C
Inaccessible to passengers
D
On the topmost deck of the vessel at all times
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