Every（）shall be fitted with a cargo tank cleaning system using crude oil washing.<br>A:existing crude oil tanker of 20000 tons deadweight and under<br>B:new crude oil tanker of 20000 tons deadweight and under<br>C:existing crude oil tanker of 20000 tons deadweight and above<br>D:new crude oil tanker of 20000 tons deadweight and above

Every（）shall be fitted with a cargo tank cleaning system using crude oil washing.
A:existing crude oil tanker of 20000 tons deadweight and under
B:new crude oil tanker of 20000 tons deadweight and under
C:existing crude oil tanker of 20000 tons deadweight and above
D:new crude oil tanker of 20000 tons deadweight and above

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