单选题Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.Amay jam against the stopsBwill not automatically position the boat at the embarkation stationCscrew may come out of the sheathDwill chafe against the falls and may cause their failure
单选题
Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.
A
may jam against the stops
B
will not automatically position the boat at the embarkation station
C
screw may come out of the sheath
D
will chafe against the falls and may cause their failure
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