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Based on meticulous research over a 10 year period, a group of climate

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Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 26 Jun 2017, 23:26
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E

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  45% (medium)

Question Stats:

53% (00:37) correct 47% (00:50) wrong based on 336 sessions

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Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined
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Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 26 Jun 2017, 23:40
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gauravraos wrote:
Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined


A,B- modifier error -- climate scientists are not based on research
C - meaning issue /S-V error" the determination of a group of scientists"
D- S-V error
E- Correct .
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Re: Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 26 Jun 2017, 23:48
gauravraos wrote:
Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined



Hi..

Two issues..
1) Modifier:- what is "based on research", it could be some theory etc but in noway ' a group of scientists'. So "Using..." Is correct while modifying 'a group...'
2) a group is SINGULAR, so requires singular verb 'has'


E Corrects both issues
E
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Re: Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 27 Jun 2017, 02:12
Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

The question prompts us to make quick choices between based on and using

Meaning:
A group of climate scientists has found something by using evidence from 10 years of research.

Here the first clause based on x must modify the following clause, not just the subject a group
But the V+ed( Based) only modifies the subject "a group"


A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined
Here a group is singular, which must be followed by singular verb
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined
All the errors eliminated
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Re: Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 18 Aug 2017, 13:39
gauravraos wrote:
Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined - a group of scientists is a singular subject so the verb should be "has"
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined close. correct verb but this is a dangling modifier
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are the use of "are" is incorrect- it should be "is"
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined "have is incorrect" it should be "has"
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined
Yes. Correctly modifies the subject AND uses the correct verb tense
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Re: Based on meticulous research over a 10 year period, a group of climate  [#permalink]

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New post 10 Sep 2017, 00:17
gauravraos wrote:
Based on meticulous research over a 10 year period, a group of climate scientists have determined that methane is accumulating in the atmosphere much faster than previously believed.

A. Based on meticulous research gathered over a 10 year period, a group of climate scientists have determined
B. Based on meticulous research gathered over a 10 year period, a group of climate scientists has determined
C. Based on meticulous research gathered over a 10 year period, the determination of a group of scientists are
D. On the basis of meticulous research gathered over a 10 year period, a group of climate scientists have determined
E. Using meticulous research gathered over a 10 year period, a group of climate scientists has determined


Official Explanation



In analyzing the answer choices for decision points, you should notice two differences quickly: the difference between "Based," "On the basis of," and "Using," to start the sentence and the verb choice of "has" vs. "have determined". Since choices of subject-verb agreement tend to be easy, you should start there.

In (A), (B), (D), and (E), the subject is the singular "group" so you must have the singular "has determined. This allows you to confidently eliminate (A) and (D). In (C), the subject is "the determination," which is also singular, so the verb "are" that is paired with it is incorrect. This leaves you to then compare the remaining possible answer choices (B) and (E).

For that decision, the only difference is the use of "Based on" vs. "Using" to start the sentence. Each of these is a participial phrase starting a sentence, so you know each must logically modify what follows. For (B), a group of scientists could never be based on anything so that is incorrect. A group of scientists can, however, use research so you know that (E) is logical and correct.

This problem highlights the power and importance of the decision points strategy. While you might never notice the error in (B) on your own, when you are given the choice of "Using" vs "Based" you should be able to then figure out what makes (B) wrong.
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