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31 Jul 2019, 19:37
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:31) correct
26%
(01:37)
wrong
based on 760
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Some cleaning fluids, synthetic carpets, wall paneling, and other products release toxins, such as formaldehyde and benzene, into the household air supply. This is not a problem in well-ventilated houses, but it is a problem in houses that are so well insulated that they trap toxins as well as heat. Recent tests, however, demonstrate that houseplants remove some household toxins from the air and thereby eliminate their danger. In one test, 20 large plants eliminated formaldehyde from a small, well-insulated house.
The passage is structured to lead to which one of the following conclusions?
(A) Houseplants can remove benzene from the air.
(B) Nonsynthetic products do not release toxins into houses.
(C) Keeping houseplants is an effective means of trapping heat in a poorly insulated house.
(D) Keeping houseplants can compensate for some of the negative effects of poor ventilation.
(E) The air in a well-insulated house with houseplants will contain fewer toxins than the air in a well-ventilated house without houseplants.
The passage is structured to lead to which one of the following conclusions?
(A) Houseplants can remove benzene from the air.
(B) Nonsynthetic products do not release toxins into houses.
(C) Keeping houseplants is an effective means of trapping heat in a poorly insulated house.
(D) Keeping houseplants can compensate for some of the negative effects of poor ventilation.
(E) The air in a well-insulated house with houseplants will contain fewer toxins than the air in a well-ventilated house without houseplants.
12 Apr 2021, 03:30
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Sajjad1994
OFFICIAL EXPLANATION
Choice (A) is too specific. Besides, the passage discusses formaldehyde more than it does benzene. Choice (B) is not supported by the passage. Choice (C) is not mentioned or implied by the passage. Choice (E) is quite tempting. But it is too strong. Household plants can remove some toxins. However, if the particular toxins are not present in either house, then the plants will not be a factor. Hence, by process of elimination, the answer is (D).
27 Feb 2020, 07:39
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Explanation
Some household products release dangerous toxins in the air; these toxins are not a problem in a well ventilated house but can be a problem in a poorly ventilated house. In poorly ventilated houses, however, it’s been found that houseplants can do a good job of removing toxins from the air and thus compensate for the lack of ventilation. (D) expresses the point of this passage best: keeping houseplants can compensate for some of the bad effects (i.e. toxin-poisoned air) of poor ventilation.
(A) The passage never explicitly says that benzene is one of the toxins that can be removed by houseplants; benzene is mentioned only in the beginning as an example of a toxin. The rest of the passage focuses exclusively on formaldehyde. Thus, the passage is certainly not structured to lead to the conclusion here.
(B) The author of this passage has no interest in what doesn’t release toxins; he’s interested in how to deal with toxins that are released. Moreover, we don’t know that non-synthetic products don’t release toxins; maybe some of the toxin-releasing wall paneling mentioned by the author is non-synthetic.
(C) is a distortion. The author said that houseplants can counter some of the negative aspects of living in a poorly ventilated, well-insulated house, not that houseplants can counter the negative aspects of living in a poorly insulated house; the author certainly didn’t say that houseplants conserve heat.
(E) isn’t supported by the passage. The author never directly compared the effectiveness of good ventilation to that of houseplants in controlling toxins. Indeed, if you had to make a guess, since good ventilation is described as removing the “problem” of toxins, whereas houseplants are only described as removing “some” household toxins, it looks as if the edge in effectiveness would go to ventilation.
Answer: D
Some household products release dangerous toxins in the air; these toxins are not a problem in a well ventilated house but can be a problem in a poorly ventilated house. In poorly ventilated houses, however, it’s been found that houseplants can do a good job of removing toxins from the air and thus compensate for the lack of ventilation. (D) expresses the point of this passage best: keeping houseplants can compensate for some of the bad effects (i.e. toxin-poisoned air) of poor ventilation.
(A) The passage never explicitly says that benzene is one of the toxins that can be removed by houseplants; benzene is mentioned only in the beginning as an example of a toxin. The rest of the passage focuses exclusively on formaldehyde. Thus, the passage is certainly not structured to lead to the conclusion here.
(B) The author of this passage has no interest in what doesn’t release toxins; he’s interested in how to deal with toxins that are released. Moreover, we don’t know that non-synthetic products don’t release toxins; maybe some of the toxin-releasing wall paneling mentioned by the author is non-synthetic.
(C) is a distortion. The author said that houseplants can counter some of the negative aspects of living in a poorly ventilated, well-insulated house, not that houseplants can counter the negative aspects of living in a poorly insulated house; the author certainly didn’t say that houseplants conserve heat.
(E) isn’t supported by the passage. The author never directly compared the effectiveness of good ventilation to that of houseplants in controlling toxins. Indeed, if you had to make a guess, since good ventilation is described as removing the “problem” of toxins, whereas houseplants are only described as removing “some” household toxins, it looks as if the edge in effectiveness would go to ventilation.
Answer: D
