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Re: One of the most noxious wind-borne allergens is ragweed (Ambrosia) [#permalink]
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Choice (A) is not supported, because the passage never compares the rates of pollen production in plants in different climates. Choice (B) is supported by the phrase mowing can actually be counterproductive. Choice (C) is supported by the statement that high humidity rates reduce the spread of ragweed, a wind-borne allergen, by causing the grains to clump. The clumping must have some negative effect on the wind’s ability to carry the pollen, making choice (C) true.
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Re: One of the most noxious wind-borne allergens is ragweed (Ambrosia) [#permalink]
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The answer to this question lies in the line, Some species of Lepidoptera (butterflies, skippers, and moths) larvae feed on ragweed, but this arena of control is not well-funded, and consequently not well-researched. The author mentions the species to indicate that there may be a potential answer to the problem of controlling ragweed, but this answer has not been fully explored. This most closely matches choice (B). Choice (A) is wrong because the author doesn’t make a comparison between the methods of control. Choice (C) is wrong because the species discussed are not mammals. The author does suggest the government explore natural remedies, but choice (D) doesn’t properly answer the question. The mention of some species of Lepidoptera is not used to plead with the government. Choice (E) is incorrect because earlier in the passage the author indicates that complete elimination of the ragweed is unlikely.
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