Which of the following best completes the passage below?
At a recent conference on environmental threats to the North Sea, most participating countries favored uniform controls on the quality of effluents, whether or not specific environmental damage could be attributed to a particular source of effluent. What must, of course, be shown, in order to avoid excessively restrictive controls, is that______
(A) any uniform controls that are adopted are likely to be implemented without delay
(B) any substance to be made subject to controls can actually cause environmental damage
(C) the countries favoring uniform controls are those generating the largest quantities of effluents
(D) all of any given pollutant that is to be controlled actually reaches the North Sea at present（B）
(E) environmental damage already inflicted on the North Sea is reversible
题目中whether or not specific environmental damage could be attributed to a particular source of effluent怎么理解？
感觉B和这句话矛盾
谢谢~~~~~~~~~
这道题答案就是B哦。原文意思是最近一个会议上大部分参加的国家支持统一治理排出物的质量，不管特别的环境污染是否应归罪于某个特定的排出物（你问的那句话的意思）。为了避免过分的严格治理——B意思是：被管理的那些物质确实引起了环境污染。简言之，就是说统一治理，缺乏特别问题特别分析。下划线的两个句子是解题关键。
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