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QOTD #11 Scientists today accept that the increased severity

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QOTD #11 Scientists today accept that the increased severity [#permalink]

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Scientists today accept that the increased severity of hurricanes in the last 10 years has been a result of warmer water in the Caribbean, which “feeds” the storms as they pass over it by a mechanism not yet completely understood. Thus, these severe hurricanes are yet more evidence of global warming.

Which of the following, if true, would most strengthen the argument above?

(A) Accurate statistics on the warming of the earth do not go back more than 100 years.

(B) Scientists have not discovered a new undersea current, fueled by an undersea volcano, which could have funneled warmer water into the Caribbean.

(C) The arctic ice caps have been losing three feet of circumference each year for the past five years.

(D) A new modeling computer program projects that the severity of hurricanes will increase over the next 10 years.

(E) Some scientists believe they will soon prove that the mechanism by which a storm picks up energy from warm water is based on convection.

[Reveal] Spoiler: OE
To weaken a causal argument, propose an alternate cause. To strengthen a causal argument, remove an alternate cause. Choice (A) weakens the argument, so cross that off. Choices (C) and (D) both appear to strengthen the case for global warming in general, but do not make the important connection between the warming of the waters of the Caribbean and global warming in general. Choice (E) promises that the mechanism that creates more severe storms will soon be better understood, but that doesn’t help to make the case that the warm water causing more severe hurricanes is related to global warming. The best answer is (B). While choice (B) might seem unlikely, it strengthens this causal argument by removing a possible alternate cause. If there were an undersea volcano heating the Caribbean, then that might be what was causing the severe hurricanes, not global warming.
[Reveal] Spoiler: OA

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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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Scientists today accept that the increased severity of hurricanes in the last 10 years has been a result of warmer water in the Caribbean, which “feeds” the storms as they pass over it by a mechanism not yet completely understood. Thus, these severe hurricanes are yet more evidence of global warming.

Which of the following, if true, would most strengthen the argument above?

(A) Accurate statistics on the warming of the earth do not go back more than 100 years.

(B) Scientists have now discovered a new undersea current, fueled by an undersea volcano, which could have funneled warmer water into the Caribbean.

(C) The arctic ice caps have been losing three feet of circumference each year for the past five years.

(D) A new modeling computer program projects that the severity of hurricanes will increase over the next 10 years.

(E) Some scientists believe they will soon prove that the mechanism by which a storm picks up energy from warm water is based on convection.

the option E does the job

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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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New post 25 Feb 2016, 16:24
Option E .
Argument claims in the conclusion that "severe" Hurricanes are the evidence of Global Warming. In option E, some scientists are going to prove that how hurricanes are gaining its strength and becoming "severe" from warm water , which is resulted from global warming.

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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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New post 26 Feb 2016, 04:10
how come B is correct ? having undersea volcano has nothing to do with global warming :-(

likewise, scientist proving that warm water induces storm doesn't say about global warming.

imo, no answer deals with this issue.
can some expert comment on this please.

thanks in advance.
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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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I looked this problem up elsewhere and found a very important typo. Answer choice B should read "Scientists have not discovered."

As currently printed above, B would weaken. If we switch it to "not," then it eliminates a competing explanation. carcass, can you make the fix?
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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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New post 29 Feb 2016, 02:59
DmitryFarber wrote:
I looked this problem up elsewhere and found a very important typo. Answer choice B should read "Scientists have not discovered."

As currently printed above, B would weaken. If we switch it to "not," then it eliminates a competing explanation. carcass, can you make the fix?


Sorry guys, but the question is correct as it is written. I checked it out on the original book. Though, is impossible in the second choice, as Dmitry pointed out, to be NOW: it must be to strengthen the argument has NOT discovered

The OA is B. Added the OE

Moreover, another alternative explanation by another gmat instructor confirms that is B

Quote:
Think a bit more about the focus of the passage as opposed to dissecting pieces of the argument

A) Off scope, we are talking about events in the past ten years and their effect on temps
B) Correct, confirms that the cause of the increased severity is not fully understood.
C) Off scope again, we are talking about warm water in the Caribbean, not the ice caps.
D) Not worried about the future
E) We are not concerned with other theories


Feel free to discuss on this question. I am here :)
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Re: QOTD #11 Scientists today accept that the increased severity [#permalink]

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New post 29 Feb 2016, 04:07
Making a T diagram :

The important point is we are connecting hurricanes with global warming as it has already been deduced that warm water is connected with the storms. So all we need to strengthen is: global warming is causing warmer water.

The sentence can be broken down to :


global warming = warmer water



So prethinking, I would look for something which shows that there is not other explanation/ something which strengthens the relation.

A C D are out in the first glance, extraneous informations

Out of B and E

B) So there is no other reason why temperature is rising. This must be because of global warming ( Hold on to this)
E) " Some scientists believe they will soon prove that the mechanism by which a storm picks up energy from warm water is based on convection" This is a classic GMAT trap. Using words from the passage that really don't mean anything.

So what if storms pick up by convection? Or radiation? or blah blah. We have already deduced that hot water is fuelling the storms. Nowhere does the question talk about the mechanism through which the storm is picking up the heat.



So B is clearly the winner.
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QOTD #11 Scientists today accept that the increased severity [#permalink]

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New post 04 Dec 2017, 06:29
Scientists today accept that the increased severity of hurricanes in the last 10 years has been a result of warmer water in the Caribbean, which “feeds” the storms as they pass over it by a mechanism not yet completely understood. Thus, these severe hurricanes are yet more evidence of global warming.


Which of the following, if true, would most strengthen the argument above?

(A) Accurate statistics on the warming of the earth do not go back more than 100 years. -- not enough info

(B) Scientists have now discovered a new undersea current, fueled by an undersea volcano, which could have funneled warmer water into the Caribbean. -- not a global phenomenon

(C) The arctic ice caps have been losing three feet of circumference each year for the past five years. -- not enough info

(D) A new modeling computer program projects that the severity of hurricanes will increase over the next 10 years. -- info regarding future is of no use

(E) Some scientists believe they will soon prove that the mechanism by which a storm picks up energy from warm water is based on convection. -- not enough info

**typo in option B

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QOTD #11 Scientists today accept that the increased severity   [#permalink] 04 Dec 2017, 06:29
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