A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as（）.

A.a cargo that will be damaged if it gets wet
B.bulk liquids
C.cargoes that will cause condensation
D.liquids in containers

A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay

A.manufacturer
B.ABS
C.Coast Guard
D.shipper