单选题Logbooks are used to record the events occurring when（）.Athe ship is in a harborBthe ship is at anchorageCthe ship is underwayDall of the above
单选题
Logbooks are used to record the events occurring when（）.
A
the ship is in a harbor
B
the ship is at anchorage
C
the ship is underway
D
all of the above
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