At a recent conference on environmental threats to the North

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At a recent conference on environmental threats to the North [#permalink]

19 Jan 2012, 10:20

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77% (01:35) correct

22% (00:45) wrong

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At a recent conference on environmental threats to the North Sea, most participating countries favored uniform controls on the quality on 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
(E) environmental damage already inflicted on the North Sea is reversible

I am confused between B and D. does anybody clarify the wording of these 2 sentences? Particularly option D on what basis we have to eliminte this

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Magoosh GMAT Instructor

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Re: cr [#permalink]

19 Jan 2012, 15:58

For answer choice (D), imagine Germany has been dumping mercury into its rivers, mercury which eventually reaches the North Sea.

(D) is saying that it is important that all of the mercury reach the North Sea. If mercury causes environmental damage, then it doesn't matter whether all of it reaches the North Sea. The mercury is causing damage. Therefore we can eliminate (D) based on the word 'all.'

Now let's say, Germany dumps a lot of oxidimide (just made that up) into its river. A uniform control on oxidimide would only make sense if oxidimide is shown to cause environmental damage. This is what (B) is saying - that a substance should only be subject to strict controls if it has been shown to cause environmental damage.

Hope that helps!
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Christopher Lele
Magoosh Test Prep

Re: cr [#permalink] 19 Jan 2012, 15:58

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At a recent conference on environmental threats to the North

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