E is the right answer.Quote:
Conclusion: This country does not need any more restrictions on pollution. In fact, we should abolish those that are currently on the books.
Premise: In spite of various restrictions, pollution levels have actually increased over the past 40 years. Most importantly, dramatic statistics show that, as pollution levels have increased over this period, the general health of the population has improved rather than deteriorated.
We are to infer the basis of the author's conclusion that there should be no restriction on pollution. From the first sentence of the premise above, the author says that: in spite of various restrictions, pollution levels have actually increased over the past 40 years. This means that the author feels that the various restrictions placed on pollution are ineffective since pollution levels are going up despite the laws restricting pollution. Hence, the author is of the view that the laws need to be scrapped. Option E is thus the right answer.
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(A) they are no longer needed to improve the general health of the population
The argument did not state that the general health of the population improved at some point in time and later became ineffective. A is incorrect.
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(B) they reduce the positive effect that pollution has on the general health of the population
The argument said that dramatic statistics show that, as pollution levels have increased over this period, the general health of the population has improved rather than deteriorated. This does not however mean that the restrictions have reduced the positive effects that pollution has on the general health. The author only states that contrary to expectations that increase in pollution will lead to deterioration of the health system, the health of the population rather improved. B is incorrect.
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(C) statistics show that as pollution restrictions have increased so have pollution levels.
The argument did not show any form of correlation between pollution restrictions and the levels of pollution. The argument only says that although the restrictions are present, pollution has rather increased contrary to expectations that it should decrease. C is incorrect.
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(D) pollution has not yet reached levels that are detrimental to the health of the general population
The argument does not weigh the current levels of pollution against any threshold that is detrimental to the health of the general population. D is incorrect.
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(E) they are ineffective in lowering pollution levels
This is the right answer as per the reasoning above.