单选题Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.Akept on board no more than 2 yearsBinspected and serviced every 6 monthsCdestroyed if more than 5 years oldDmaintained in good and serviceable condition
单选题
Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.
A
kept on board no more than 2 years
B
inspected and serviced every 6 months
C
destroyed if more than 5 years old
D
maintained in good and serviceable condition
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