Houses built during the last ten years have been found to : GMAT Critical Reasoning (CR)
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# Houses built during the last ten years have been found to

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Houses built during the last ten years have been found to [#permalink]

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06 Dec 2006, 07:14
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Houses built during the last ten years have been found to contain indoor air pollution at levels that are, on average, much higher than the levels found in older houses. The reason air-pollution levels are higher in the newer houses is that many such houses are built near the sites of old waste dumps or where automobile emissions are heavy.
Which of the following, if true, calls into question the explanation above?
(A) Many new houses are built with air-filtration systems that remove from the house pollutants that are generated indoors.
(B) The easing of standards for smokestack emissions has led to an increase in air-pollution levels in homes.
(C) New houses built in secluded rural areas are relatively free of air pollutants.
(D) Warm-weather conditions tend to slow down the movement of air, thus keeping pollution trapped near its source.
(E) Pressboard, an inexpensive new plywood substitute now often used in the construction of houses, emits the pollutant formaldehyde into the house.
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06 Dec 2006, 07:16
E for me

Thus you have to negate the fact that pollution comes from cars and dumps nearby.....
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06 Dec 2006, 08:57
Yes E for me too.
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06 Dec 2006, 15:29
another E
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06 Dec 2006, 15:50
E
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06 Dec 2006, 18:21
Argument's explanation says indor pollution is caused by an outdoor source. Choice E, however, proposes a counter explanation which says indoor pollutions are actually caused by an indoor source - inexpensive new plywood substitute that emits the pollutants into the house.
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06 Dec 2006, 19:20
E it is.
B is a trap. It explains why pollution would have increased in ALL homes, not in just the NEW homes.
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07 Dec 2006, 01:29
kripalkavi wrote:
E it is.
B is a trap. It explains why pollution would have increased in ALL homes, not in just the NEW homes.

Thanks. OA is E.
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08 Dec 2006, 16:51
E from me...
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24 Aug 2007, 03:02
I picked B but E is the OA. So, I leave these comments for the next person who chooses B and can not find a way to elliminate it: B does not do the discrimination required between new and old houses.
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27 Jan 2013, 00:47
asaf wrote:
I picked B but E is the OA. So, I leave these comments for the next person who chooses B and can not find a way to elliminate it: B does not do the discrimination required between new and old houses.

Since B will increase pollution in both newer and older houses doesn't give a reason as to why newer houses are more polluted ...
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Re: Houses built during the last ten years have been found to [#permalink]

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17 Jul 2016, 11:59
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Houses built during the last ten years have been found to   [#permalink] 17 Jul 2016, 11:59
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