In a certain wildlife park, park rangers are able to track : GMAT Critical Reasoning (CR)
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# In a certain wildlife park, park rangers are able to track

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Director
Joined: 15 Aug 2005
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In a certain wildlife park, park rangers are able to track [#permalink]

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23 Nov 2005, 23:55
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In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. Female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. Probably, therefore, some substance in the tranquilizer inhibits fertility.

Which of the following is an assumption on which the argument depends?

A. The dose of tranquilizer delivered by a tranquilizer dart is large enough to give the rangers putting collars on rhinoceroses a generous margin of safety.
B. The fertility rate of uncollared female rhinoceroses in the park has been increasing in the past few decades.
C. Any stress that female rhinoceroses may suffer as a result of being immobilized and handled has little or no negative effect on their fertility.
D. The male rhinoceroses in the wildlife park do net lose their collars as often as the parkâ€™s female rhinoceroses do.
E. The tranquilizer used in immobilizing rhinoceroses is the same as the tranquilizer used in working with other large mammals.
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Director
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24 Nov 2005, 00:14
Should be (C).

C. Any stress that female rhinoceroses may suffer as a result of being immobilized and handled has little or no negative effect on their fertility.

If C is negated, then the low fertility is not due to the tranquilizer.
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24 Nov 2005, 00:15
it should be C.
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24 Nov 2005, 00:52
good question..
C makes sense..
Director
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24 Nov 2005, 21:44
A - Argument does not talk about quantity.
B - How does that matter.
C, D - Close
E - How does that matter.

Out of C & D - C directly related to the rhinoceroses & tranquilizer
Hence C.
24 Nov 2005, 21:44
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