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Offshore oil-drilling operations entail an unavoidable risk

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Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 23 Nov 2009, 10:44
00:00
A
B
C
D
E

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Question Stats:

77% (02:17) correct 23% (01:34) wrong based on 192 sessions

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Offshore oil-drilling operations entail an unavoidable risk of an oil spill, but importing oil on tankers presently
entails an even greater such risk per barrel of oil. Therefore, if we are to reduce the risk of an oil spill without
curtailing our use of oil, we must invest more in offshore operations and import less oil on tankers.
Which of the following, if true, most seriously weakens the argument above?
(A) Tankers can easily be redesigned so that their use entails less risk of an oil spill.
(B) Oil spills caused by tankers have generally been more serious than those caused by offshore operations.
(C) The impact of offshore operations on the environment can be controlled by careful management.
(D) Offshore operations usually damage the ocean floor, but tankers rarely cause such damage.
(E) Importing oil on tankers is currently less expensive than drilling for it offshore
I am confused between options A & E. According to CR bible, we have to weaken the conclusion so option E seems good. But , option A weakens the premises. I dont know which one is correct. am I missing any point?plz explain. I saw this post in this forum,but nobody explained my doubt
[Reveal] Spoiler: OA
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 23 Nov 2009, 11:13
Hello TomB,

Our primary concern over here is oil spill and not monetary benefit.
According to the author bringing oil in tanker is very risk, but If we can prove to the author there are methods to make this process risk free then we are proving him wrong and A does just that.

(A) Tankers can easily be redesigned so that their use entails less risk of an oil spill.: correct

But options D and E talk about damage to ocean flour and monetary benefit and both are irrelevant in the present context,

(D) Offshore operations usually damage the ocean floor, but tankers rarely cause such damage.
(E) Importing oil on tankers is currently less expensive than drilling for it offshore.

Other options ,

B supports author .
C is irrelevant.

Hope this helps :)
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 23 Nov 2009, 13:13
A

The argument is for curtailing the risk of oil spills. Only A address the risk. E does not address the argument.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 24 Nov 2009, 22:43
TomB wrote:
Offshore oil-drilling operations entail an unavoidable risk of an oil spill, but importing oil on tankers presently
entails an even greater such risk per barrel of oil. Therefore, if we are to reduce the risk of an oil spill without curtailing our use of oil, we must invest more in offshore operations and import less oil on tankers.

Which of the following, if true, most seriously weakens the argument above?

(A) Tankers can easily be redesigned so that their use entails less risk of an oil spill.
(B) Oil spills caused by tankers have generally been more serious than those caused by offshore operations.
(C) The impact of offshore operations on the environment can be controlled by careful management.
(D) Offshore operations usually damage the ocean floor, but tankers rarely cause such damage.
(E) Importing oil on tankers is currently less expensive than drilling for it offshore


It has to be A.

The conclusion is that " Offshore oil-drilling operations" is less risky than "importing oil on tankers". Therefore "importing oil on tankers" should be reduced.

A says that "tankers importing oil" are more flexible to redisigned for safe oil importing. If so, then "tankers importing oil" should be used so that "tankers importing oil" can be redisigned as and when necessary so that the risk can be controlled.

Does any other choice offers the same possibility? No.

Therefore, it is A.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 25 Nov 2009, 08:39
It has to be A as we are concerned about oil spills and not the monetary benefits.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 26 Nov 2009, 00:26
(A) Tankers can easily be redesigned so that their use entails less risk of an oil spill.
-If tankers can be redesigned, then it make no sense to invest in offshore operations. SO CORRECT

(B) Oil spills caused by tankers have generally been more serious than those caused by offshore operations.
-The argument talks only of risk and not on degree of risk . SO INCORRECT

(C) The impact of offshore operations on the environment can be controlled by careful management.
-Strengthens. SO INCORRECT

(D) Offshore operations usually damage the ocean floor, but tankers rarely cause such damage.
- Strengthens. SO INCORRECT

(E) Importing oil on tankers is currently less expensive than drilling for it offshore
Strengthens
-The argument talks only of risk and not on cost . SO INCORRECT
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 27 Nov 2009, 01:34
A
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 10 Aug 2011, 15:06
I've a problem with this answer choice. The choice says the risk of spill can be reduced, but doesn't say the risk of the spill can be reduced to a level lower than that of offshore operations. So I'm not too convinced that A should be the right choice.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 12 Aug 2011, 07:12
bschool2014 wrote:
I've a problem with this answer choice. The choice says the risk of spill can be reduced, but doesn't say the risk of the spill can be reduced to a level lower than that of offshore operations. So I'm not too convinced that A should be the right choice.



You are right, wording could have been litlle more better! but again no other choice come even near to be good enough :wink: no :?:
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 22 Nov 2011, 00:30
As per power score "You are more likely to encounter an ans that hurts the argument but does not ultimately destroy the author's position. Would this answer choice make the author reconsider his / her position or force the author to respond".

Hope that helps.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 22 Nov 2011, 15:52
A it is.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 25 Nov 2011, 00:51
+1 for A
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 08 Sep 2014, 07:58
In the premise it is stated, Offshore oil-drilling operations entail "an unavoidable risk of an oil spill"
It means no matter how much you invest in off-shore drilling, you can only reduce the risk, not minimize it to zero.

Now if by some means we can prove that risk of oil spill in case of tankers is reduced and so that the risk in tankers is less than risk in off-shore drilling then we can make the conclusion less believable.

Choice A does that.

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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 28 Jul 2015, 17:24
Request you not to write your queries/answers/opinions in question window. It prevents ppl from analysing the question. The whole purpose of GMAT Club forum goes wasted by doing so.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 26 Dec 2015, 06:05
Hello

I have a small concern with A => The way the argument is structured, it says:
Premise: Offshore Drill Ops (ODO) are risky but importing oil tankers (IOT) entails an even greater risk per barrel
Conclusion: To be safe without limiting use, we should invest more in ODO vs. IOT

Now if we look at A i.e. "Tankers can easily be redesigned so that their use entails less risk of an oil spill" --> Here, for sure we see that the risk is diminished but since the premise and conclusion both are of the comparative nature, we must have a reason that forces us to believe that with the change in design, the risk will be lower in comparison to ODO. A simply states that the risk is lowered but we are still not sure if the redesign sufficiently helps us resolve the issue at hand (i.e. Risk for IOT<Risk for ODO)

With this, I was quite confused b/w A and D (D involves external context). Any help will be appreciated.

Thanks



asimov wrote:
A

The argument is for curtailing the risk of oil spills. Only A address the risk. E does not address the argument.
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 26 Dec 2015, 07:49
rsaahil90 wrote:
Hello

I have a small concern with A => The way the argument is structured, it says:
Premise: Offshore Drill Ops (ODO) are risky but importing oil tankers (IOT) entails an even greater risk per barrel
Conclusion: To be safe without limiting use, we should invest more in ODO vs. IOT

Now if we look at A i.e. "Tankers can easily be redesigned so that their use entails less risk of an oil spill" --> Here, for sure we see that the risk is diminished but since the premise and conclusion both are of the comparative nature, we must have a reason that forces us to believe that with the change in design, the risk will be lower in comparison to ODO. A simply states that the risk is lowered but we are still not sure if the redesign sufficiently helps us resolve the issue at hand (i.e. Risk for IOT<Risk for ODO)

With this, I was quite confused b/w A and D (D involves external context). Any help will be appreciated.

Thanks


I agree that it would be nice to have some idea of the degree to which the tankers can be improved, but by process of elimination A is the only option that weakens the argument to any degree. It may not destroy the conclusion, but it does absolutely weaken it. D, on the other hand, gives us information that we can't evaluate because we don't know the impact of oil on the ocean floor - maybe the best kind of oil spill is one that only impacts the ocean floor and not the surface...

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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 28 Dec 2015, 20:55
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rsaahil90 wrote:
Hello

I have a small concern with A => The way the argument is structured, it says:
Premise: Offshore Drill Ops (ODO) are risky but importing oil tankers (IOT) entails an even greater risk per barrel
Conclusion: To be safe without limiting use, we should invest more in ODO vs. IOT

Now if we look at A i.e. "Tankers can easily be redesigned so that their use entails less risk of an oil spill" --> Here, for sure we see that the risk is diminished but since the premise and conclusion both are of the comparative nature, we must have a reason that forces us to believe that with the change in design, the risk will be lower in comparison to ODO. A simply states that the risk is lowered but we are still not sure if the redesign sufficiently helps us resolve the issue at hand (i.e. Risk for IOT<Risk for ODO)

With this, I was quite confused b/w A and D (D involves external context). Any help will be appreciated.

Thanks



asimov wrote:
A

The argument is for curtailing the risk of oil spills. Only A address the risk. E does not address the argument.


Responding to a pm:

Premises:
Offshore ODOs entail an unavoidable risk of an oil spill.
Importing oil on tankers presently entails an even greater such risk per barrel of oil.

Conclusion:
If we are to reduce the risk of an oil spill without curtailing our use of oil, we must invest more in ODO and import less oil on tankers.

Note that the premises tell us that oil spill risk is lower in ODOs and higher in tankers. The conclusion (which is a conditional) says that if we are to reduce the risk of oil spill, we should invest more in ODOs.
It seems perfectly reasonable conclusion, right? It says that taking only oil spill risk into account, we should use more ODOs. If I were to prethink on this, I wouldn't know how to weaken it.
But, we can weaken it because the conclusion says "we should invest more in ODOs" and not "use more ODOs". We don't know what effect "investing more" could have on the amount of risk involved in ODO and tankers.

Then we check the options.

(A) Tankers can easily be redesigned so that their use entails less risk of an oil spill.
Now, this does weaken our conclusion. If we invest in tankers, we could easily reduce the risk. Also, now the use of the word "presently" in our premises makes sense. The premises say clearly that presently the risk with tankers is higher. So it all fits in. Yes, we don't know whether with investment, the risk with tankers will go below the risk with ODOs but it clearly raises a question and hence weakens the conclusion.

(B) Oil spills caused by tankers have generally been more serious than those caused by offshore operations.
This, if anything, strengthens our conclusion.

(C) The impact of offshore operations on the environment can be controlled by careful management.
Irrelevant. We are only considering risk of oil spill.

(D) Offshore operations usually damage the ocean floor, but tankers rarely cause such damage.
Doesn't matter what they actually damage - the ocean floor or agricultural land or underground water etc. The risk of oil spill is less with ODOs and that is all we are concerned with.

(E) Importing oil on tankers is currently less expensive than drilling for it offshore.
Irrelevant. We are only considering risk of oil spill, not cost.

Answer (A)
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Re: Offshore oil-drilling operations entail an unavoidable risk [#permalink]

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New post 30 Dec 2015, 12:53
I fell for D but later realized its a shell game answer choice

we should be concerned only about risk of oil spillage whereas choice D talks about damage caused by Offshore drilling on ocean.

A is the correct choice as it weakens the conclusion
Re: Offshore oil-drilling operations entail an unavoidable risk   [#permalink] 30 Dec 2015, 12:53
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