Sunspots, vortices of gas associated with strong : GMAT Sentence Correction (SC)
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# Sunspots, vortices of gas associated with strong

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Manager
Joined: 21 Feb 2010
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Sunspots, vortices of gas associated with strong [#permalink]

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05 Dec 2010, 14:29
00:00

Difficulty:

25% (medium)

Question Stats:

89% (01:39) correct 11% (01:43) wrong based on 9 sessions

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Sunspots, vortices of gas associated with strong
electromagnetic activity, are visible as dark spots on
the surface of the Sun but have never been sighted on
the Sun’s poles or equator.
(A) are visible as dark spots on the surface of the
Sun but have never been sighted on
(B) are visible as dark spots that never have been
sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots
although never sighted at
(D) appear as dark spots on the surface of the Sun,
although never having been sighted at
(E) appear as dark spots on the Sun’s surface,
which have never been sighted on

the OA is A. however, i don't see the parallel in the underlined portion. please explain!! thanks!
[Reveal] Spoiler: OA
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05 Dec 2010, 15:39
tt11234 wrote:
Sunspots, vortices of gas associated with strong
electromagnetic activity, are visible as dark spots on
the surface of the Sun but have never been sighted on
the Sun’s poles or equator.
(A) are visible as dark spots on the surface of the
Sun but have never been sighted on
(B) are visible as dark spots that never have been
sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots
although never sighted at
(D) appear as dark spots on the surface of the Sun,
although never having been sighted at
(E) appear as dark spots on the Sun’s surface,
which have never been sighted on

the OA is A. however, i don't see the parallel in the underlined portion. please explain!! thanks!

Hi,

what strikes you as unparallel in the original sentence?

We have:

Quote:
Sunspots... are visible as [X] but have never been sighted on [Y].

which is a perfectly acceptable construction.
Manager
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05 Dec 2010, 17:42
skovinsky wrote:
tt11234 wrote:
Sunspots, vortices of gas associated with strong
electromagnetic activity, are visible as dark spots on
the surface of the Sun but have never been sighted on
the Sun’s poles or equator.
(A) are visible as dark spots on the surface of the
Sun but have never been sighted on
(B) are visible as dark spots that never have been
sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots
although never sighted at
(D) appear as dark spots on the surface of the Sun,
although never having been sighted at
(E) appear as dark spots on the Sun’s surface,
which have never been sighted on

the OA is A. however, i don't see the parallel in the underlined portion. please explain!! thanks!

Hi,

what strikes you as unparallel in the original sentence?

We have:

Quote:
Sunspots... are visible as [X] but have never been sighted on [Y].

which is a perfectly acceptable construction.

i don't see the paralleism in this sentence? do you mean "are visible as [X] but have never been sighted on [Y]" is parallel?
Kaplan GMAT Instructor
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Location: Toronto
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05 Dec 2010, 18:53
tt11234 wrote:

Hi,

what strikes you as unparallel in the original sentence?

We have:

Quote:
Sunspots... are visible as [X] but have never been sighted on [Y].

which is a perfectly acceptable construction.

i don't see the paralleism in this sentence? do you mean "are visible as [X] but have never been sighted on [Y]" is parallel?[/quote]

I'm really not sure what about it you think is unparallel. It's not like there's a list or a common construction.

Why do you think the sentence is bad? Why do you think there's a parallelism issue at all?

Sentences only require parallelism when they have components that can be matched up.
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05 Dec 2010, 20:10
tt11234 wrote:
Sunspots, vortices of gas associated with strong
electromagnetic activity, are visible as dark spots on
the surface of the Sun but have never been sighted on
the Sun’s poles or equator.
(A) are visible as dark spots on the surface of the
Sun but have never been sighted on : Hold
(B) are visible as dark spots that never have been
sighted on the surface of the Sun : Eliminated
(C) appear on the surface of the Sun as dark spots
although never sighted at : Hold
(D) appear as dark spots on the surface of the Sun,
although never having been sighted at Eliminated
(E) appear as dark spots on the Sun’s surface,
which have never been sighted on : Eliminated

the OA is A. however, i don't see the parallel in the underlined portion. please explain!! thanks!

Between A and C -

Sighted on is better. Moreover, the first clause in C introduces Sun Spots passively i.e appear as dark spots on Sun rather than actively are visible as dark spots on ...Sun.This is not a good way.

Hence C eliminated.

A prevails.
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Manager
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05 Dec 2010, 22:35
Picked A, just sounded the best.

Would this be more of an idiomatic issue?
Manager
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18 Aug 2011, 13:13
Can anyone explain how does parallelism come into picture?
A has 'but' but other choices don't. Why do they need parallelism?
In fact, how does even A achieve parallelism?
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Hope this post helps!
Your kudos will let me know.

Manager
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18 Aug 2011, 18:00
I picked A, because of following ||ism.

Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun’s poles or equator.
Re: parallelism   [#permalink] 18 Aug 2011, 18:00
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