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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] New post 31 Mar 2012, 12:10
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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 environments 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.


Please explain with why option D is wrong
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Re: Offshore oil-drilling [#permalink] New post 01 Apr 2012, 11:31
We must choose an option that strengthens the argument that tankers, rather than offshore operations are more suitable for procuring oil without causing an oil spill.

Option (A) is the option which clearly supports this. If tankers can easily be redesigned to reduce the risk of an oil spill, then they become a more viable option to get oil while minimizing the spill risk.

Option (D) is wrong because we are not discussing damage to the ocean floor here - just the risks of an oil spill. This is therefore irrelevant to the argument.

(A) is therefore the correct option
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Re: Offshore oil-drilling [#permalink] New post 07 May 2012, 10:54
There are other posts like this. I just did one the other day.

offshore-oil-drilling-operations-entail-an-unavoidable-risk-65550.html
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Re: Offshore oil-drilling [#permalink] New post 08 May 2012, 08:51
monikaleoster 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?

Please explain with why option D is wrong

To reduce risk of oil spil --------> We must invest in offshore operations Rather than Importing oil. We must weaken this conclusion.

A. Tankers can easily be redesigned so that their use entails less risk of an oil spill. Weakens
B. Oil spills caused by tankers have generally been more serious than those caused by offshore operations. Not Relevant
C. The impact of offshore operations on the environments can be controlled by careful management. Not relevant
D. Offshore operations usually damage the ocean floor, but tankers rarely cause such damage. Not relevant to conclusion. Conclusion speaks about reducing the risk of oil spill. It doesnt speak about the effect of offshore operations
E. Importing oil on tankers is currently less expensive than drilling for it offshore. Cost angle. one of the most frequently used incorrect option
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Re: Offshore oil-drilling   [#permalink] 08 May 2012, 08:51
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