Two individuals authorized to serve as a lifeboatman must be assigned to any lifeboat that has a capacity of more than（）.

A.stow rainwater; these 4 spaces do not take up valuable space
B.act as stabilizers by filling with sea water as soon as the raft is inflated and upright
C.hold the freshwater required by regulation to be provided in the raft when packed
D.None of the above

A.3 short blasts of the ship's whistle
B.1 short blast of the ship's whistle
C.3 long blasts of the ship's whistle
D.1 long blast of the ship's whistle

A.bridge
B.forward station
C.aft station
D.any hold in which the stevedores are working