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Although air pollution was previously thought to exist

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Although air pollution was previously thought to exist [#permalink] New post 11 Jan 2008, 11:17
00:00
A
B
C
D
E

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(N/A)

Question Stats:

50% (02:55) correct 50% (00:00) wrong based on 1 sessions
Although air pollution was previously thought to
exist almost exclusively in our nation’s cities,
the recent increase in the number of persons
suffering from illnesses attributed to excessive
air pollution leaves us no choice but to conclude
that other, nonurban areas are now affected.
Which of the following, if true, would most
seriously weaken the conclusion of the argument
above?
(A) The nation’s cities have seen a marked
decrease in levels of air pollution.
(B) The nation has experienced a sharp
decrease in the number of people moving
out of its cities.
(C) Illnesses due to air pollution are among
the least common causes of death to
urban dwellers.
(D) Many illnesses previously thought
unrelated to air pollution are now
considered to be caused by it.
(E) As a result of the problems in urban
areas, nonurban areas have passed strict
pollution control measures.
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Re: CR Air pollution [#permalink] New post 11 Jan 2008, 11:24
(D) Many illnesses previously thought
unrelated to air pollution are now
considered to be caused by it.

explains why there is a sharp increase in air pollution related illnesses without air pollution actually getting any worse or spreading to rural areas
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Re: CR Air pollution [#permalink] New post 11 Jan 2008, 11:34
JCLEONES wrote:
Although air pollution was previously thought to
exist almost exclusively in our nation’s cities,
the recent increase in the number of persons
suffering from illnesses attributed to excessive
air pollution leaves us no choice but to conclude
that other, nonurban areas are now affected.
Which of the following, if true, would most
seriously weaken the conclusion of the argument
above?
(A) The nation’s cities have seen a marked
decrease in levels of air pollution.
(B) The nation has experienced a sharp
decrease in the number of people moving
out of its cities.
(C) Illnesses due to air pollution are among
the least common causes of death to
urban dwellers.
(D) Many illnesses previously thought
unrelated to air pollution are now
considered to be caused by it.
(E) As a result of the problems in urban
areas, nonurban areas have passed strict
pollution control measures.


A: strengthens if anything
C: irrelevant
E: irrelevant


D and B. I voted for D on this b/c it was a stronger case. Im not entirely sure why B isn't a viable option either.
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Re: CR Air pollution [#permalink] New post 11 Jan 2008, 20:44
D
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Re: CR Air pollution [#permalink] New post 12 Jan 2008, 06:44
Conclusion: Non urban areas are affected with pollution problems.
Reasoning: Because the number of people suffering from illnesses attributed to excessive air pollution is increasing.

Its a weaken question. So, we have to weaken the conclusion or one of its assumptions or premises listed.

(D) Many illnesses previously thought unrelated to air pollution are now considered to be caused by it.
D says a rise in number is may be due to more illneses are now counted as related to pollution. So, it may not be the case at all that pollution is now propogating to non-urban areas.
D.
Re: CR Air pollution   [#permalink] 12 Jan 2008, 06:44
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