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. mayjamagainstthestops

B. willnotautomaticallypositiontheboatattheembarkationstation

C. screwmaycomeoutofthesheath

D. willchafeagainstthefallsandmaycausetheirfailure