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Although exposure to asbestos is the primary cause of

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Although exposure to asbestos is the primary cause of [#permalink] New post 11 Aug 2005, 06:15
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Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus. Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers’ hypothesis?

A. SV40 is widely used as a research tool in cancer laboratories.
B. Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
C. Recently discovered samples of the vaccine dating from 1960 still show traced of the virus.
D. In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
E. In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.
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 [#permalink] New post 11 Aug 2005, 07:04
E is my answer
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Re: CR: SV40 [#permalink] New post 11 Aug 2005, 08:58
(E) for me.

(B) came close, but what if the actual samples discovered were the ones that were discovered?
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 [#permalink] New post 11 Aug 2005, 18:38
I'll go with C which is probably wrong i just dont Get E? would anyone care for an explanation of E?
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Re: CR: SV40 [#permalink] New post 12 Aug 2005, 05:25
only C is best. why E, guys? E weakens, not strengthens, the arguent.

Quote:
Which of the following, if true, most strongly supports the researchers’ hypothesis?
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 [#permalink] New post 12 Aug 2005, 05:48
'C' should be the answer.

'E' doesn't make sense,
It does not means that "vaccine that contaminated with the virus caused XYZ". The cause can be different.

'C' supports that there was contamination... hence the argument.
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Re: CR: SV40 [#permalink] New post 12 May 2006, 22:47
okdongdong wrote:

A. SV40 is widely used as a research tool in cancer laboratories.
B. Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
C. Recently discovered samples of the vaccine dating from 1960 still show traced of the virus.
D. In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
E. In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.


C does nothing to support the hypothesis, since there is no any information about the recent rate of having mesotheliomas resulted from SV40

E is the answer
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 [#permalink] New post 12 May 2006, 23:00
No doubt, E is the best.

The hypothesis is not whether the virus cause the cancer or not. The only
thing that the hypothesis deals with is the source of the virus. So between
C and E , E is the best , since C doesn't add anything to the evidence presented in the argument that in 1960's some polio vaccine was contaminated with the virus.
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 [#permalink] New post 12 May 2006, 23:17
E is the answer.
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 [#permalink] New post 13 May 2006, 02:25
E for me.

(B) only repeats a fact that is already mentioned in the paragraph previously. (E) gives further proof about the source of the vaccine by referring to the Finland example.
  [#permalink] 13 May 2006, 02:25
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