The term "discharge", as it applies to the pollution regulations, means（）.

A.remove combustibiles from direct exposure
B.cool the bulkhead around the fire
C.close all openings to the area
D.shut off electrical power

A.is properly vented
B.contains no explosive fumes
C.has no oil in the bilges
D.all of the above

A.an electrical switchboard
B.the pressure tanks
C.the fuel oil tanks
D.the oily rag bin