单选题The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.Asafe speed only specifiedBnot less than 120 feet per minuteCnot more than 120 feet per minuteDnot more than 90 feet per minute
单选题
The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.
A
safe speed only specified
B
not less than 120 feet per minute
C
not more than 120 feet per minute
D
not more than 90 feet per minute
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