单选题Preventer bars are fitted on lifeboat releasing hooks to prevent（）.Athe falls from unhooking if the releasing gear is operated accidentally while the boat is being loweredBoperation of the release lever until the boat is waterborneCthe falls from rehooking after they have been releasedDaccidental unhooking when the falls become slack
单选题
Preventer bars are fitted on lifeboat releasing hooks to prevent（）.
A
the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered
B
operation of the release lever until the boat is waterborne
C
the falls from rehooking after they have been released
D
accidental unhooking when the falls become slack
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