Sound can travel

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Sound can travel

by nahid078 » Fri Jul 03, 2015 7:19 am
Sound can travel through water for enormous distances, prevented from dissipating its acoustic energy as a result of boundaries in the ocean created by water layers of different
temperatures and densities.
A. prevented from dissipating its acoustic energy as a result of
B. prevented from having its acoustic energy dissipated by
C. its acoustic energy prevented from dissipating by
D. its acoustic energy prevented from being dissipated as a result of
E preventing its acoustic energy from dissipating by
Last edited by nahid078 on Fri Jul 03, 2015 7:34 am, edited 1 time in total.

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by KALKIDEV » Fri Jul 03, 2015 7:33 am
C/E seems correct answer but i guess in E meaning is changed ,here it suggests that sound itself prevented dissipation..
so C

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by x.dominicraj » Mon Jul 06, 2015 7:21 am
Answer should be C since in option E "preventing" modifies the whole of previous clause....trying to mean as if "sound prevents its energy from dissipating" which is incorrect.

Hence C.

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by src_saurav » Tue Jul 07, 2015 8:03 am
E for me is the answer. Yes sound is preventing its acoustic energy from escaping.

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by mindful » Tue Jul 07, 2015 8:20 am
I would say D.

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by GMATGuruNY » Tue Jul 07, 2015 12:37 pm
Sound can travel through water for enormous distances, prevented from dissipating its acoustic energy as a result of boundaries in the ocean created by water layers of different temperatures and densities.

A. prevented from dissipating its acoustic energy as a
result of
B. prevented from having its acoustic energy dissipated by
C. its acoustic energy prevented from dissipating by
D. its acoustic energy prevented from being dissipated as a result of
E preventing its acoustic energy from dissipating by
Generally, COMMA + VERBed refers to the immediately preceding noun.
Thus, in A and B, prevented seems to modify distances.
Since it is not the distances but the ACOUSTIC ENERGY that is prevented from dissipating, eliminate A and B.

Generally, COMMA + VERBing refers to the SUBJECT of the preceding clause.
Thus, in E, preventing seems to modify SOUND, implying that the sound is preventing its own energy from dissipating.
Not the intended meaning.
Eliminate E.

In D, as a result of boundaries implies that the boundaries themselves are RESULTING in something.
Not possible; only an ACTION or an EVENT can result in something.
Eliminate D.

The correct answer is C.

OA: its acoustic energy prevented from dissipating by boundaries in the ocean
Here, dissipating is a GERUND: a verb serving as a NOUN.
More specifically, dissipating serves as the object of the preposition from.
From what action is the energy prevented?
The energy is prevented from DISSIPATING.
By boundaries serves to express that BOUNDARIES IN THE OCEAN prevent the energy from dissipating.
What prevents the energy from dissipating?
The energy is prevented from dissipating BY BOUNDARIES IN THE OCEAN.

The entire phrase its acoustic energy prevented from dissipating by boundaries in the ocean is an absolute phrase.
For a description of this grammatical construction, check my posts here:

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