Difficult CR: need help

This topic has expert replies
Newbie | Next Rank: 10 Posts
Posts: 7
Joined: Sun Nov 20, 2011 11:21 pm

Difficult CR: need help

by Ramesh L.S. » Mon Mar 12, 2012 10:40 pm
Image


though I picked the correct answer choice, I am not convinced with it; Please explain the answer.

User avatar
Legendary Member
Posts: 1325
Joined: Sun Nov 01, 2009 6:24 am
Thanked: 105 times
Followed by:14 members

by vikram4689 » Tue Mar 13, 2012 9:25 am
Only B is supported by the argument. Hence B is correct ans
Premise: If you like my post
Conclusion : Press the Thanks Button ;)

User avatar
GMAT Instructor
Posts: 88
Joined: Tue Jan 17, 2012 5:01 pm
Thanked: 54 times
Followed by:37 members

by chris@magoosh » Tue Mar 13, 2012 2:37 pm
The argument states that the higher the temperature the greater the amount of molecular motion. The more molecular motion, the greater the number of errors in the visual system. Therefore, animals whose body temperature-and by extension the temperature of the retinae-match their surroundings are likely to have more molecular motion. And the more molecular motion, the greater the number of errors in the visual system.

Therefore, the answer that matches this is (B).

@Ramesh, let me know if that was helpful :).

Newbie | Next Rank: 10 Posts
Posts: 7
Joined: Sun Nov 20, 2011 11:21 pm

by Ramesh L.S. » Thu Mar 15, 2012 4:28 am
Thanks Chris for the reply and the explanation provided; The point that is bothering me is that, when the answer choice talks about body temperature is high, should I directly take it for granted that the retina temperature will also be high . If we look at the premises given in the question, more the retina temperature more problem in the visual system.