In a certain wildlife park, park rangers are able to track

Question

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.

Bhai · Answer

C.

Negate it and the argument breaks.

willget800 · Answer

Agree with Bhai... C looks good..

razrulz · Answer

using negation i cld get only C ...

Yurik79 · Answer

real headache!C for me
  Any stress that female rhinoceroses may suffer as a result of being immobilized and handled has little or no negative effect on their fertility.   therefore, some substance in the tranquilizer inhibits fertility.

giddi77 · Answer

go C go. 

Hmm. I really love the negation method. It's much better than trying to think about an assumption...

ps_dahiya · Answer

I see clear C.

giddi, you made the old concept of negation,often forgotten, alive in my mind. Thanks buddy

ceointhemaking · Answer

It is C.

andy_gr8 · Answer

C it is..
But can prove D too;)
Male looses its collars more often.. Due to this he is tranquilized more often... Due to the trauma he stops having S$X with the female and so less babies.. and we end up thinking that the female is infertile
:twisted:

Jokes apart C it is

vivek123 · Answer

<img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /> <img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /> <img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /> <img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" />

vivek123 · Answer

Bhai, cracked it. Negation is the key in the assumptions!

The OA is "C".

shahnandan · Answer

C here

GMATT73 · Answer

Good one buddy. (C) definately fails the neation test.

In a certain wildlife park, park rangers are able to track

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