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 _______________ .
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Aany uniform controls that are adopted are likely to be implemented without delay
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Bany substance to be made subject to controls can actually cause environmental damage
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Cthe countries favoring uniform controls are those generating the largest quantities of effluents
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Dall of any given pollutant that is to be controlled actually reaches the North Sea at present
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Eenvironmental damage already inflicted on the North Sea is reversible
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