All lifeboats，rescue boats，and rigid-type liferafts shall be stripped，cleaned，and thoroughly overhauled at least once every（）.

A.pulling on the painter line
B.forcing open the container which operates the CO₂
C.hitting the hydrostatic release
D.using the hand pump provided

A.keep the liferaft from capsizing
B.navigate against the current
C.keep personnel from getting seasick
D.stay in the general location

A.Open equipment pack
B.Issue anti-seasickness medicine
C.Cut painter and clear the ship
D.Dry the liferaft floor and inflate