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Emissions from automobiles that burn gasoline and automobiles that bur

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Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post Updated on: 18 Oct 2018, 03:06
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A
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  45% (medium)

Question Stats:

62% (00:47) correct 38% (01:04) wrong based on 129 sessions

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Emissions from automobiles that burn gasoline and automobiles that burn diesel fuel are threatening the quality of life on our planet, contaminating both urban air and global atmosphere. Therefore, the only effective way to reduce such emissions is to replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that create fewer emissions.

Which one of the following is an assumption on which the argument depends?


(A) Reducing the use of automobiles would not be a more effective means to reduce automobile emissions than the use of methanol.

(B) There is no fuel other than methanol that is cleaner-burning than both diesel fuel and gasoline.

(C) If given a choice of automobile fuels, automobile owners would not select gasoline over methanol.

(D) Automobile emissions constitute the most serious threat to the global environment.

(E) At any given time there is a direct correlation between the level of urban air pollution and the level of contamination present in the global atmosphere.

Originally posted by WinWinMBA on 15 Jun 2005, 13:43.
Last edited by Bunuel on 18 Oct 2018, 03:06, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 15 Jun 2005, 17:39
1
Premise:
1) Emissions from autmobiles that burn gasoline/diesel fuel contaminate urban air and global atmosphere
2) Threathen quality of life

Conclusion:
3) ONLY effective solution is to replace diesel/gasoline with cleaner-burning fuels (methanol) that create fewer emmissions.

Which one of the following is an assumption on which the argument depends?

(A) Reducing the use of automobiles would not be a more effective means to reduce automobile emissions than the use of methanol.
- A. shows that only effectiv solution is to replace the type of fuel used.

(B) There is no fuel other than methanol that is cleaner-burning than both diesel fuel and gasoline.
- Out. The use of such as in the conclusion suggests there's more than just methanol that can do the trick

(C) If given a choice of automobile fuels, automobile owners would not select gasoline over methanol.
- not important

(D) Automobile emissions constitute the most serious threat to the global environment.
- does not hold up conclusion

(E) At any given time there is a direct correlation between the level of urban air pollution and the level of contamination present in the global atmosphere.
- out of scope

A it is.
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 15 Jun 2005, 22:50
the assumption leads to the conclusion that there is only ONE effective way namely the replacement of fuels. now we have to find the unstated fact that says that there is an even more effective way so that the conclusion falls apart. the negation of A) says that there is an more effective way. therefore the author cannot adhere his conclusion.
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 15 Jun 2005, 23:03
Always remember that the assumption is to hold up the conclusion. Without this assumption, the conclusion is no longer true.

Premise + (Assumption) = Conclusion :-D
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 16 Jun 2005, 05:37
The OA is A. I fell for B, and realized that the stimulus did not specify methanol as the ONLY or BEST cleaner-burning fuel.
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 17 Apr 2018, 13:13
Everyone here is saying A mostly, but I feel A has no direct connection to the Conclusion, A totally takes over the conclusion, meanwhile D when negated weakens the conclusion and as LET says D is the least Extreme while A is the most extreme.
I am with D, but need an expert to provide solution with reasoning.
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Re: Emissions from automobiles that burn gasoline and automobiles that bur  [#permalink]

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New post 21 Apr 2018, 10:16
BussinesArtist wrote:
Everyone here is saying A mostly, but I feel A has no direct connection to the Conclusion, A totally takes over the conclusion, meanwhile D when negated weakens the conclusion and as LET says D is the least Extreme while A is the most extreme.
I am with D, but need an expert to provide solution with reasoning.

The conclusion is that "the only effective way to reduce such emissions is to replace the conventional diesel fuel and gasoline used in automobiles with cleaner-burning fuels, such as methanol, that create fewer emissions."

If reducing the use of automobiles is a more effective way to reduce emissions, then replacing diesel/gasoline with cleaner-burning fuels would NOT be the only effective way to reduce emissions. There would be at least two effective ways to reduce emissions in that case, so the conclusion would be invalidated.

As for (D), the author says that the emissions are threatening the quality of life on our planet, contaminating both urban air and global atmosphere. That doesn't mean that the emissions have to be the MOST serious threat to the global environment. Maybe the emissions are in the top 5 but not #1. The author's argument would remain the same.

So (A) is the best answer.

I hope this helps, and welcome to GMAT Club!
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Re: Emissions from automobiles that burn gasoline and automobiles that bur &nbs [#permalink] 21 Apr 2018, 10:16
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