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# ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica.....

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Manager
Joined: 24 Feb 2015
Posts: 53

Kudos [?]: 122 [2], given: 26

((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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31 Aug 2015, 11:48
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Difficulty:

95% (hard)

Question Stats:

40% (01:20) correct 60% (01:42) wrong based on 188 sessions

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In 2013, the sea ice in Antarctica reached a record high. 80% of the increase in ice volume can be attributed to the strong westerly winds in the South Pole. The ice level is much higher than the recorded ice levels in the 1970s. This proves that global warming is a hoax.

The argument above is based on which of the following assumptions?

(a) Global warming and sea ice levels are correlated
(b) Increase in ice volume is the result of low temperature
(c) One of the effects of global warming is the melting of sea ice
(d) Sea ice level in Antarctica has a greater correlation to global warming
(e) There was no interruption in collecting data about the sea ice level from 1970 to 2013

Its an interesting question with the answer choices looking very similar as well as relevant. Give it a shot
Source : f1gmat.com
[Reveal] Spoiler: OA

Last edited by Prajat on 28 Sep 2015, 11:38, edited 2 times in total.

Kudos [?]: 122 [2], given: 26

Manager
Joined: 10 Feb 2012
Posts: 78

Kudos [?]: 14 [0], given: 724

Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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31 Aug 2015, 11:54
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Prajat wrote:
In 2013, the sea ice in Antarctica reached a record high. 80% of the increase in ice volume can be attributed to the strong westerly winds in the South Pole. The ice level is much higher than the recorded ice levels in the 1970s. This proves that global warming is a hoax.

The argument above is based on which of the following assumptions?

(a) Global warming and sea ice levels are correlated
(b) Increase in ice volume is the result of low temperature
(c) One of the effects of global warming is the melting of sea ice
(d) Sea ice level in Antarctica has a greater correlation to global warming
(e) There was no interruption in collecting data about the sea ice level from 1970 to 2013

Its an interesting question with the answer choices looking very similar as well as relevant. Give this a go )
Source : f1gmat.com

c it is. good question with very good options.

Kudos [?]: 14 [0], given: 724

Intern
Joined: 19 Oct 2014
Posts: 39

Kudos [?]: 19 [0], given: 35

Location: India
Concentration: Finance, Entrepreneurship
GMAT 1: 600 Q48 V25
GMAT 2: 630 Q48 V28
GPA: 3.26
WE: Operations (Manufacturing)
Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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01 Sep 2015, 11:22
Conclusion:Despite global warning->Ice level raised in antartica
I initially put 'D', However 'D' seems to suggests less the concept of hoax/tricking.
Any option weakening Ice level vs global warming relation should be good. So option C

Kudos [?]: 19 [0], given: 35

Manager
Joined: 24 Feb 2015
Posts: 53

Kudos [?]: 122 [0], given: 26

Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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01 Sep 2015, 13:35
Let me explain the thought process for this one (since only 36% have got it correct so far)
This question actually goes back to the basics ( correlation , causation etc. )

Firstly, since it's an assumption question, we must find an unstated premise which when added to the argument will logically prove the conclusion. So we need to find an option which tells us that the effect of global warming on ice volume should be opposite of what is presented over here.
Option (a) & (d) talk about correlation, but provide no conclusive cause-effect relationship =>> Hence, eliminated.
option (e) is necessary but not sufficient (again no conclusive evidence) ----->> Eliminated
option (b) states a valid point but it only seeks to establish that the cold winds caused the increase in ice volume. Nothing is explicitly stated about global warming -----> Eliminated

option (c) is the only one which gives us what we were looking for. Since global warming CAUSES melting of ice, so.........

Although the options are seemingly quite close, but still there is ONLY ONE correct answer. The rest are flawed.
That's GMAT

Kudos [?]: 122 [0], given: 26

Manager
Joined: 13 Nov 2014
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Kudos [?]: 9 [0], given: 105

GMAT 1: 590 Q42 V29
GMAT 2: 630 Q47 V29
Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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01 Sep 2015, 20:47
A really nice question,
close call between C and D,
but C is better because it gives direct relation while D just states that they are correlated, directly or inversely is not stated,
C is the winner
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Manager
Joined: 02 Nov 2014
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GMAT Date: 08-04-2015
Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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02 Sep 2015, 01:05
2 situations can lead the Global Warming to be hoax:

i) Global warming was expected to be the reason behind the sea ice level but "the strong westerly winds in the South Pole" took all the credit.
ii) Global warming was expected to counter the effect of the [color=#005e20]the strong westerly winds in the South Pole
but nothing happened.[/color]

Note: i) leads to choice D and ii) to choice C.
But, D does not clearly state that Global Warming is the reason behind sea ice level, but claims a greater correlation. Greater to what?? Unclear.
C directly talks in terms of (ii).

So, C wins.

Kudos [?]: 129 [0], given: 75

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Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica..... [#permalink]

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27 Sep 2017, 00:45
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: ((Tricky ASSUMPTION question)) In 2013, the sea ice in Antarctica.....   [#permalink] 27 Sep 2017, 00:45
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