Which of the following best completes the passage below?
At a recent conference on enviormental threats to the North Sea, most participating countries favored uniform controls on the quality of effluents, whether or not specific enviormental damage could be attributed to a particular source of effluent. What most, of course, be shoiwn, 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 enviormental 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
e\ enviromental damage already inficted on the North Sea is reversible
请牛牛 给解释下题目 然后 想问下 D为什么不对？ OG给的解释 想不通 | 
