Each completed page of the Oil Record Book must be signed by the （）.

A.all vessels, regardless of size and commercial application
B.any barge or other ship which is constructed or operated in such a manner that no oil in any form can be carried aboard
C.an oil tanker of 150 gross tons or above, or other ship of 400 gross tons or above
D.an oil tanker of 400 gross tons and above, or other ships of 150 gross tons and above

A.all hands are at their fire stations
B.all fire-fighting equipment is at the scene
C.the fixed systems are activated
D.the fire is contained and no longer spreading

A.one year
B.two years
C.four years
D.five years