In discussing oil pollution, one important fact to remember is that the problem remains the same （） heavy （） light oil is spilled into the water.

A.Assembly
B.Organization
C.Company
D.Administration

A.a regional
B.the best
C.an international
D.an ideal

A.safety at sea
B.prevention of human injury or loss of life
C.avoidance of damage to the marine environment and to property
D.all of the above