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Although there has been great scientific debate for decades

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Although there has been great scientific debate for decades [#permalink] New post 25 Jul 2007, 13:01
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C
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E

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Although there has been great scientific debate for decades over global warming, most scientists now agree that human activity is causing the Earth’s temperature to rise. Though predictions vary, many global warming experts believe that average global temperatures will rise between three and eight degrees Fahrenheit during the next century. Such an increase would cause an alarming rise in sea levels, displacing millions of people by destroying major population centers along the world’s coastlines.

Which of the following is an assumption in support of the argument’s conclusion?

A. New technological developments in the next century will not divert rising seas from the world’s coastal cities.

B. Individuals will not become more aware of the steps they can take to reduce the emission of greenhouse gases.

C. Rising sea levels similarly affect all coastal population centers.

D. Some global warming experts predict a greater than eight degree Fahrenheit increase in global temperatures during the next century.

E. Human activity is the sole cause of increasing global temperatures.
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 [#permalink] New post 25 Jul 2007, 13:14
My answer is A.
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 [#permalink] New post 25 Jul 2007, 13:15
A is good
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 [#permalink] New post 25 Jul 2007, 13:25
Why not C, I felt A was bit out of scope as there is not talk about next centuary "technological advances" at all.
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 [#permalink] New post 25 Jul 2007, 14:49
C

we're assuming all costal cities will be affected equally, and if so it supports the statement
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 [#permalink] New post 25 Jul 2007, 14:50
a3d wrote:
Why not C, I felt A was bit out of scope as there is not talk about next centuary "technological advances" at all.


was A the offical answer?
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 [#permalink] New post 25 Jul 2007, 15:30
a3d wrote:
Why not C, I felt A was bit out of scope as there is not talk about next centuary "technological advances" at all.


if you look at 'technological advances' literally then yes it seems out of scope. but look at it this way. we are given that rising temp will cause rise in sea levels and that will destroy the major coastal population centers. now to find the assumption we need something that will fall apart above sequence if refuted.

now if we refute A, that means we will have some technological solution that will prevent the rising sea level from destroying the coastal population centers and the conclusion falls apart.

but C is not true, because the conclusion has nothing to do with how rising sea levels affect the coastal population center. it could have different levels of affect on different centers.
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 [#permalink] New post 25 Jul 2007, 17:24
I would say E

Conclusion is : human activity is causing the Earth’s temperature to rise

We need a assumption which when negated makes the conclusoion fall apart

E should be it
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 [#permalink] New post 25 Jul 2007, 18:07
OA is A
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 [#permalink] New post 25 Jul 2007, 23:09
ankita wrote:
a3d wrote:
Why not C, I felt A was bit out of scope as there is not talk about next centuary "technological advances" at all.


if you look at 'technological advances' literally then yes it seems out of scope. but look at it this way. we are given that rising temp will cause rise in sea levels and that will destroy the major coastal population centers. now to find the assumption we need something that will fall apart above sequence if refuted.

now if we refute A, that means we will have some technological solution that will prevent the rising sea level from destroying the coastal population centers and the conclusion falls apart.

but C is not true, because the conclusion has nothing to do with how rising sea levels affect the coastal population center. it could have different levels of affect on different centers.


Thanks, excellent explanation!
  [#permalink] 25 Jul 2007, 23:09
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