【单选题】
The release of oil from oil tankers into the sea is ______.
A.the only source of pollution
B.a kind of pollution caused by the release of natural substances
C.of worldwide consequence
D.most harmful to mankind
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根据网考网移动考试中心的统计,该试题:
18%的考友选择了A选项
62%的考友选择了B选项
16%的考友选择了C选项
4%的考友选择了D选项