The max effluent of the oil content from a ship of 400 tons gross tonnage and above other than an oil tanker is（）.<br>A:less than 100 parts per million<br>B:more than 100 parts per million<br>C:at least 100 parts per million<br>D:100 parts per million

The max effluent of the oil content from a ship of 400 tons gross tonnage and above other than an oil tanker is（）.
A:less than 100 parts per million
B:more than 100 parts per million
C:at least 100 parts per million
D:100 parts per million

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