Displays of the aurora borealis, or "northern : GMAT Sentence Correction (SC)
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# Displays of the aurora borealis, or "northern

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Displays of the aurora borealis, or "northern [#permalink]

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27 Oct 2010, 01:59
2
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77% (01:44) correct 23% (00:47) wrong based on 375 sessions

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Displays of the aurora borealis, or "northern lights", can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

A.to affect the trajectories of ballistic missiles,induce
B. that the trajectories of ballistic missiles are affected,induce
C. that it affects the trajectories of ballistic missiles are affected and induces
D.that the trajectories of ballistic missiles are affected and induces
E. to affect the trajectories of ballistic missiles and induce

Now i dunno who to decide between A and E, Can someone help?
[Reveal] Spoiler: OA
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27 Oct 2010, 05:14
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The displays can heat the atmosphere to do two things. 1. to affect the trajectories blah, blah and 2. ( to) induce electric currents blah blah . So an – and - is required between - missiles - induce - to complete the series with proper parallelism.

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Last edited by daagh on 04 Apr 2011, 08:12, edited 3 times in total.
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27 Oct 2010, 05:37
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in A you have run-on sentence, (comma splice).
Use and to join two independent clauses.
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Re: Displays of the aurora borealis, or "northern [#permalink]

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02 Jun 2014, 02:40
1
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gmatpunjabi wrote:
Can someone provide a choice by choice break down why each one is wrong?

can heat... enough to affect in A and E is more idiomatic than the use of the subordinate clause beginning with "that" in B, C, and D.

B - produces an illogical and ungrammatical statement by making induce parallel with the verb heat rather than with the appropriate form of the verb affect;

C - lacks agreement in using the singular pronoun it to refer to the plural noun displays

D is faulty because induces cannot fit grammatically with any noun in the sentence.

A incorrectly separates the two infinitives to affect and [to] induce with a comma when it should compound them with and, as does E.
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27 Oct 2010, 08:30
E
[enough to..] and [the northern lights heat and induce]
A implies that the missile induce[s] no
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27 Oct 2010, 21:28
E

A is a run on sentence. you need a conjunction before induce.
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Re: Displays of the aurora borealis, or "northern [#permalink]

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04 Jan 2012, 08:58
Can someone provide a choice by choice break down why each one is wrong?
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Re: Displays of the aurora borealis, or "northern [#permalink]

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04 Jan 2012, 12:27
+1 E

"enough to" is the idiom. B, C, and D out.
There are two effects of these northern lights: affecting the trajectories of ballistic missiles AND inducing electric currents. AND is needed. E is the answer.
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Re: Displays of the aurora borealis, or "northern [#permalink]

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04 Jan 2012, 23:37
E. to induce is also correct but not given. || ism.
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27 Sep 2012, 03:24
Lvnguyen87 wrote:
E
[enough to..] and [the northern lights heat and induce]
A implies that the missile induce[s] no

I chose A

I assumed "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" to be a modifier modifying Aurora lights. Why is this wrong? So I read the question as "Displays of the aurora borealis, BLAH BLAH BLAH (modifier) , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

So 'Displays' is plural and goes with 'induce' and by virtue of which other answer choices are wrong. What did I miss?
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29 Sep 2012, 08:09
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ace312 wrote:
Lvnguyen87 wrote:
E
[enough to..] and [the northern lights heat and induce]
A implies that the missile induce[s] no

I chose A

I assumed "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" to be a modifier modifying Aurora lights. Why is this wrong? So I read the question as "Displays of the aurora borealis, BLAH BLAH BLAH (modifier) , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

So 'Displays' is plural and goes with 'induce' and by virtue of which other answer choices are wrong. What did I miss?

Hi ace312, I don't think "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" is modifying Aurora lights. Consider below example (I just made up),

Sunlight from sun, can heat earth's surface - here Sunlight is heating earth's surface, not sun, the same way Displays are heating atmosphere, not the aurora borealis in the below example. Hope this clears your doubt or reply if you have more questions.

student26 wrote:
Displays of the aurora borealis, or "northern lights", can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

A.to affect the trajectories of ballistic missiles,induce
B. that the trajectories of ballistic missiles are affected,induce
C. that it affects the trajectories of ballistic missiles are affected and induces
D.that the trajectories of ballistic missiles are affected and induces
E. to affect the trajectories of ballistic missiles and induce

Now i dunno who to decide between A and E, Can someone help?
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01 Oct 2012, 09:26
daagh wrote:
The displays can heat the atmosphere to do two things. 1. to affect the trajectories blah, blah and 2. ( to) induce electric currents blah blah . So an – and - is required between - missiles - induce - to complete the series with proper parallelism.

If the sentence uses "inducing" after comma in option A, will it be considered right?
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Re: Displays of the aurora borealis, or "northern [#permalink]

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27 Feb 2013, 15:34
Damn!! GMAT is a tricky test. The point is that we should never ever underestimate the need to read and understand the sentence!
I choose A because the sentence was correct and parallel. Then when i saw the OA i realized
" induce electric currents that can cause X (blackouts in some areas) and Y (corrosion in north-south pipelines)" need and before it to make it parallel with the first part .
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Re: Displays of the aurora borealis, or "northern [#permalink]

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01 May 2014, 16:54
Hello from the GMAT Club VerbalBot!

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Re: Displays of the aurora borealis, or "northern [#permalink]

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21 Aug 2016, 02:16
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Displays of the aurora borealis, or "northern   [#permalink] 21 Aug 2016, 02:16
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