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Country B's oil production is not sufficient to meet its

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Country B's oil production is not sufficient to meet its  [#permalink]

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New post 02 Sep 2011, 05:53
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D
E

Difficulty:

  55% (hard)

Question Stats:

59% (01:43) correct 41% (01:54) wrong based on 780 sessions

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Country B's oil production is not sufficient to meet its domestic demand .In order to sharply reduce its dependence on foreign sources of oil, Country B recently embarked on a program requiring all of its automobiles to run on ethanol in addition to gasoline. Combined with its oil production, Country B produces enough ethanol from agricultural by-products to meet its current demand for energy.

Which of the following must be assumed in order to conclude that Country B will succeed in its plan to reduce its dependence on foreign oil?

(A) Electric power is not a superior alternative to ethanol in supplementing automobile gasoline consumption.
(B) In Country B, domestic production of ethanol is increasing more quickly than domestic oil production.
(C) Ethanol is suitable for the heating of homes and other applications aside from automobiles.
(D) In Country B, gasoline consumption is not increasing at a substantially higher rate than domestic oil and ethanol production.
(E) Ethanol is as efficient as gasoline in terms of mileage per gallon when used as fuel for automobiles.

Source: MGMAT 4th Edition
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 10 Sep 2011, 10:58
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Good question to use for practice with zooming in on the exact scope of the conclusion.

Country B’s goal is to REDUCE DEPENDENCE ON FOREIGN OIL. The way it plans to do this is by requiring cars to run on ethanol as well as gas. With topics such as this one, which are often in the news, it’s tempting to bring in a whole string of assumptions that we know from the real world, but be vigiliant! You can only use the information that you have in the argument.

(A) Whether something else is superior does not affect whether ethanol would or would not help reduce the amount of gasoline (and therefore imported oil) needed. Eliminate.

(B) The relative rates of production of each material don’t matter—and we already know that we have a domestic oil deficit, bc we have to import oil! Eliminate.

(C) Whether Ethanol can be used in other ways doesn’t matter—we just want to help support the claim that mandating ethanol in cars will reduce foreign oil dependence. “Reduce” is a very clear-cut term—if we reduced the imported oil by one drop, that would still count. So while using ethanol for many other things might help with the scale of imported fuel reduced, that scale does not matter…we just want to help prove we would need at least one drop less. Eliminate.

(D) Any time you see a “not” thrown in there, it can make it harder to figure out what the thought really is. That is a deliberate move on the part of the test-writers. Having already eliminated A-C, this would be a safe place to use the negation test, to help unravel the meaning of this choice(do NOT use this test on every answer choice, as it will take way too long).

If gas consumption IS increasing at a substantially higher rate than domestic oil and ethanol production, that means that we would need more gas (and that gas would need to come from imported oil). If that is the case, then even mandating ethanol use in cars would not be sufficient to meet this substantial increased need, and therefore foreign oil dependence would NOT decrease. This is likely our answer.

(E) The relative efficiency of ethanol versus gas doesn’t matter—we care about reducing oil dependence. This is a “helpful” assumption, but not a necessary one. It’s great that ethanol is as efficient as gas (and by extension, that we could replace gas with ethanol in a one-to-one ratio) but even if it were only half as efficient, we could still produce 2x the amount of ethanol and reach our goal of reducing foreign oil dependence. Eliminate.
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 02 Sep 2011, 07:21
D.

If gasoline consumption is more than domestic oil and ethanol production, than country will not be able to meet its goals..
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 15 Sep 2011, 02:38
Went with E initially.

Missed the not in D. :(
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 18 Apr 2012, 09:36
+1 D

If the oil consumption grows faster than ethanol production, probably the country will have to buy oil abroad.
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 22 Jul 2015, 17:03
I dont understand why B is wrong. I thought since an increase in ethanol production would reduce the dependence on foreign oil since the program stated the cars will run on ethanol
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 26 Mar 2016, 11:12
These Manhattan GMAT guys are devilish.
Just look at that question and the answer choices.
Even that correct answer D is a little shifty.
I thought we were talking about reducing oil import by substituting the reduction with ethanol use.
We don't even know if cars or other applications are greater consumer of energy in B.
Do we?
C'mon.
I had to assume that cars are significant users of oil in the country.
Of course option B can be ruled out or ruled in depending on if other applications are significant users of the oil and ethanol.
If they use like MOST then the substitution in CARS use will cause NO sharp fall in oil import.

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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 15 Jun 2018, 02:46
pre-think:

We need to think about a choice which is on the line of smoothing the plan. such as demand can be full filled successfully.

Choice D is saying that rise in the demand of oil is not more than domestic oil and ethanol production. What if this happened? Well demand of fuel will fell short and they have to end up with import of oil. D must be the assumption.
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Re: Country B's oil production is not sufficient to meet its  [#permalink]

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New post 12 Aug 2018, 03:27
is the "gasoline" and the "oil" identical things?
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Country B's oil production is not sufficient to meet its  [#permalink]

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New post 12 Aug 2018, 06:06
XYZABCABC wrote:
is the "gasoline" and the "oil" identical things?


Gasoline/Petrol is a refined form of Crude Oil.
Crude oil can be refined to produce products such as Gasoline/Petrol , Diesel etc.
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Country B's oil production is not sufficient to meet its &nbs [#permalink] 12 Aug 2018, 06:06
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