单选题
One of the most pressing problems regarding the sea is its conservation because of ______.
A、
the high percent decrease of fish catches during the past forty years
B、
ever-increasing amount of waste dumping into the sea
C、
invalidness of an international law
D、
Both A and B
【正确答案】
D
【答案解析】
[解析] 从文章第一段的第二、三句可知，往海里过量倾倒废物使鱼的产量剧减。最后一句再次提醒，随着海上开采业的发展与探索，倾倒在海里的废物量将不斯增加，局势也将更加严峻。因此选项D为正确答案。
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