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# The peaks of a mountain range, acting like rocks in a

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The peaks of a mountain range, acting like rocks in a [#permalink]

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14 Nov 2005, 20:09
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The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is
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Director
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14 Nov 2005, 20:25
(D) and (E) distorts the original meaning.
(C) has wrong verb - is

Between (A) and (B), I pick (B).

"They" are more important than "the air".
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14 Nov 2005, 20:40
Well A, B, D are definately out cuz of verb-sent agreement.

The resulting flow pattern IS
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Re: SC The peaks [#permalink]

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14 Nov 2005, 22:13
C. the subject is "the resulting flow pattern", which needs singular verb -is. It rules out ABD. E is in passive. So remains C.
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Re: SC The peaks [#permalink]

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14 Nov 2005, 22:16
joemama142000 wrote:
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is

Because it has to end in "is", it's either C or E. I say E because it's more simple and concise.
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14 Nov 2005, 23:45
A, B, D are out.
Out of C & E.
I vote for C.
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15 Nov 2005, 00:16
joemama142000 wrote:
Well A, B, D are definately out cuz of verb-sent agreement.

The resulting flow pattern IS

Oops, I missed that
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15 Nov 2005, 10:30
I GO FOR B GUYS.......CHECK THAT AGAIN
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15 Nov 2005, 10:41
I go for C

Out of C & E (subject verb agreement), C is appropriate
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Re: SC The peaks [#permalink]

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15 Nov 2005, 10:58
Go with C. A, B, D are out because of plural/singular issue. E changes meaning and is not clear.

joemama142000 wrote:
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is
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15 Nov 2005, 12:12
how is C so different from E? Can someone explain? thanks
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01 Nov 2006, 17:27
Thanks Bhai! I was trying to figure out why C over E. I guess "they" in E can refer to "crests and troughts" or anything before that right?
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03 Mar 2007, 12:23
In C, two "them" refer to different things. Is this right? Need grammar explains, thank.

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, is known as "standing waves."
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03 Mar 2007, 15:15
I would pick C. Correct verb for the 'resulting flow pattern' is 'Is'. So A, B and D are out. C looks better than E.
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Re: SC The peaks [#permalink]

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09 Feb 2008, 20:26
Please could any one suggest how to eliminate E.

OE says , The clause follow although is awkward.

The sentense formation with option E.

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with stationary crests and troughs although they are formed by rapidly moving air, is known as "standing waves."

according to OE => they are formed by rapidly moving air -> awkward.

Could any one explain !!!!
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Re: SC The peaks [#permalink]

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14 Apr 2008, 10:50
I'm in the same boat as you are, looking for a better explanation. I picked E over C due to simplicity, and gmat loves simplicity - but not in this case. Some of you say it's C because of active voice. So is active voice more important than simplicity?

huntgmat wrote:
Please could any one suggest how to eliminate E.

OE says , The clause follow although is awkward.

The sentense formation with option E.

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with stationary crests and troughs although they are formed by rapidly moving air, is known as "standing waves."

according to OE => they are formed by rapidly moving air -> awkward.

Could any one explain !!!!
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Re: SC The peaks [#permalink]

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15 Apr 2008, 08:37
I think it's C becasue E changes the meaning of the sentence a little bit. C is longer, but clearer, just like Bhai said.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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10 Nov 2014, 07:06
joemama142000 wrote:
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is

Time :2.10 secs
OA:C
A- use of are - subject is "resulting flow pattern,"
B- use of are - subject is "resulting flow pattern,"
C- Correct use of "is" and concise
D-use of are - subject is "resulting flow pattern,"
E - use of pronoun "they" -- not clear
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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10 Nov 2014, 07:21
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are – SV agreement proble. - ‘Are’ should be ‘is’ as Pattern is singular

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are – Same as A

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is - Correct

(D) stationary crests and troughs although the air that forms them is moving rapidly, are – Same as A

(E) stationary crests and troughs although they are formed by rapidly moving air, is – Contrast is omitted. Ambiguous ‘They’.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink]

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15 Sep 2015, 06:58
navaljoshi wrote:
joemama142000 wrote:
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are

(E) stationary crests and troughs although they are formed by rapidly moving air, is

Time :2.10 secs
OA:C
A- use of are - subject is "resulting flow pattern,"
B- use of are - subject is "resulting flow pattern,"
C- Correct use of "is" and concise
D-use of are - subject is "resulting flow pattern,"
E - use of pronoun "they" -- not clear

Every one is saying

(E) stationary crests and troughs although they are formed by rapidly moving air, is

E is passive - they are formed
ambiguous pronoun - they

Can some one explain below in C

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly

Is Pronoun 'them' not ambiguous? - If 'They' in C refers to both crests and troughs what is 'them' in E refering to?
is 'air that forms them is moving' not passive? - Both C and E are active/passive in one or other form.

I have been searching for more than 10 threads nearly but could not find exact and valid explanation.
Re: The peaks of a mountain range, acting like rocks in a   [#permalink] 15 Sep 2015, 06:58

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# The peaks of a mountain range, acting like rocks in a

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