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# Carbon monoxide levels in the atmosphere grew by enough of an increase

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Manager
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Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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09 Jun 2008, 22:48
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Difficulty:

95% (hard)

Question Stats:

38% (02:02) correct 62% (02:00) wrong based on 471 sessions

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Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise.

C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.

D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise.

E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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19 Aug 2008, 02:29
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A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.
>> "grew by enough of an increased percentage" is awkward.

B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise.
>> "grew by enough of an increased percentage" is awkward.

C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.
== Correct

D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise.
>> modifier "during the twentieth century" in wrong position

E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.
>> modifier "during the twentieth century" in wrong position
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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10 Jun 2008, 04:28
1
aaron22197 wrote:
OA is C. But I really do not see any difference between C and E. Can anyone explain y not E?

C and E use the exact same words. Only the placement of "during the 20th century" is different

The word increased is placed closer to what its modifying in C - the CO levels. In E its placed closer to 20th century....

Hence C
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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17 Aug 2008, 00:33
1
sarzan wrote:
Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.
B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise.
C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.
D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise.
E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.

C.

A. grew by enough of an increased percentage is an awakward expression
B. increased by enough of a percentage is an awakward expression
C. increased sufficiently
D. increased by a sufficient percentage is an awakward expression
E. increased enough to begin is an awakward expression
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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08 Feb 2011, 07:24
1
Yes. Almost all of the choices are ugly. Burt amidst this awkwardness let us fish out some grammar

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise. ----- grew and increased are redundant. In addition it refers to what? Carbon monoxide, or atmosphere, or percentage? Terrible pronoun ambiguity.

B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise. - -‘increased by enough ……….that they began to trap’ is not idiomatic.’

C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise. – Correct sentence using the present participle causing, which rightly modifies the entire noun idea before.

D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise. ----- ‘Which’ - flouts relative pronoun touch rule

E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise. --- The wrong placement of the phrase ‘during the twentieth century, after ‘the atmosphere’ distorts the meaning of the sentence, ending to mean as if the cause of the effect was.

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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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23 Jan 2017, 06:02
1
sarzan wrote:
Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.
B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise.
C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.
D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise.
E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.

The original sentence contains several errors. First, "grew by enough of an increased percentage" is wordy and redundant. Second, the singular pronoun "it" incorrectly refers to the plural "levels." Finally, the final clause of the sentence--"and it caused the average surface temperature to rise"--is disjointed from the main clause.

(A) This choice is incorrect as it repeats the original sentence.

(B) This choice uses the unnecessarily wordy phrase "increased by enough of a percentage."

(C) CORRECT. The sentence is made more concise by rewriting "grew by enough of an increased percentage" as "increased sufficiently." This choice also eliminates the pronoun "it" from the sentence and reworks the final clause--"causing the average surface temperature to rise"--as a modifier, thereby more clearly connecting it to the main clause.

(D) This choice uses the unnecessarily wordy phrase "increased by a sufficient percentage." It also uses "which" to refer to the action of the preceding clause, though "which" grammatically refers only to the immediately preceding noun (in this case, "Earth").

(E) This choice alters the position of "during the twentieth century", thereby changing the meaning of the sentence. In this choice "during the twentieth century" modifies the carbon monoxide levels instead of describing when those levels "increased." This distorts the meaning by leaving open the possibility that carbon monoxide levels "increased enough" during some other time period (e.g., the 21st century).
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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10 Jun 2008, 01:12
OA is C. But I really do not see any difference between C and E. Can anyone explain y not E?

C and E use the exact same words. Only the placement of "during the 20th century" is different
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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23 Jan 2017, 20:47
Hi,
I agree that option C is the best of all.But doesn't "increased sufficiently...to begin" sound strange?
It seems the intention of such increase is to begin something.

Thanks
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Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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23 Jan 2017, 20:51
sleepynut wrote:
Hi,
I agree that option C is the best of all.But doesn't "increased sufficiently...to begin" sound strange?
It seems the intention of such increase is to begin something.

Thanks

You may refer the picture screenshot from Advanced Cambridge dictionary.
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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25 Mar 2019, 09:36
To me none of the options look correct. In option C, it seems like the level of the gas increased purposefully to do begin trapping heat. I have seen lot of questions where "to" is used to show purpose.
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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26 Mar 2019, 03:50
aaron22197 wrote:
Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise.

C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.

D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise.

E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise.

I don't see any of the options standing strong in the meaning.
"The levels of CO" didn't begin trapping heat
"The CO at increased level" began trapping heat
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Re: Carbon monoxide levels in the atmosphere grew by enough of an increase  [#permalink]

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15 Sep 2019, 09:34
Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise.

A) Carbon monoxide levels in the atmosphere grew by enough of an increased percentage during the twentieth century that it began to trap heat radiating from the Earth, and it caused the average surface temperature to rise. - "it" refers to? no antecedent

B) Carbon monoxide levels in the atmosphere increased by enough of a percentage during the twentieth century that they began to trap heat radiating from the Earth, causing the average surface temperature to rise. - "they" refers to? only plural noun is "levels", which does not trap heat...

C) Levels of atmospheric carbon monoxide increased sufficiently during the twentieth century to begin trapping heat radiating from the Earth, causing the average surface temperature to rise. - correct

D) Atmospheric carbon monoxide levels increased by a sufficient percentage during the twentieth century to begin trapping heat radiating from the Earth, which caused the average surface temperature to rise. - "which" modifies "the Earth" and the earth does not cause the temperature to rise

E) Levels of carbon monoxide in the atmosphere during the twentieth century increased enough to begin trapping heat radiating from the Earth, causing the average surface temperature to rise. - "during the twenties century" should modify increase, but here it is modifying atmosphere
Re: Carbon monoxide levels in the atmosphere grew by enough of an increase   [#permalink] 15 Sep 2019, 09:34
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