A study comparing a group of chronically depressed : GMAT Critical Reasoning (CR)
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# A study comparing a group of chronically depressed

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Senior Manager
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A study comparing a group of chronically depressed  [#permalink]

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07 Apr 2004, 06:22
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A study comparing a group of chronically depressed
individuals with an otherwise matched group of
individuals free from depression found significantly
more disorders of the immune system among the
depressed group. According to the researchers, these
results strongly support the hypothesis that mental
states influence the body's vulnerability to infection.

Which of the following, if true, casts the most seri-
ous doubt on the researchers' interpretation of their
findings?
(A) The researchers' view does little more than echo
a familiar theme in folklore an literature.
(B) Chronically depressed individuals are no less
careful than others to avoid exposure to
infections.
(C) Disorders of the immune system cause many of
those individuals who have them to become
chronically depressed.
(D) Individuals who have previously been free from
depression can become depressed quite
suddenly.
(E) A high frequency of infections can stem from
an unusually high level of exposure rather
than from any disorder of the immune system.
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07 Apr 2004, 08:09
I will go with C.

My reasoning :

The last sentence of the argument states that it's the mental state that affects the immune system. (A causes B). In order to weaken the argument, we can show that B causes A, and not the other way round. C clearly shows this.

Most of my answers in CR that I have attempted before were incorrect. So I wont be surprised if someone proves me wrong again.
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07 Apr 2004, 08:31
C it is for me. C says immune system can cause mental disorder and not the otherway around.
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07 Apr 2004, 12:23
I like c because it would render the assumption made completely without merit
Senior Manager
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10 Apr 2004, 19:35
yes C is OA and that makes me more chronically depressed.

rgds,
batli
10 Apr 2004, 19:35
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