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Hi,

This is a clear Modifier sentence.
Located at the coal mines...., (what is located should be here after comma) . steam engines are located at the coal mines. So A and E are out.

C. Distorted the meaning by changing to " allowed an increase " whereas intended meaning is allowed drainage of mines.
D. "allowing water to be drained out of mines" (passive construction) is not parallel to "extraction of deeper layers of coal" (a noun phrase)

B. is clear and concise. Initially i confused for the word water missing but i think its understood in the phrase drainage of mines.
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What is wrong with option C ?

Is it just wordiness ? I don't think there's any meaning distortion.
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RaghavSingla
What is wrong with option C ?

Is it just wordiness ? I don't think there's any meaning distortion.

There are two major things other than what babuvgmat pointed out.

1st repeating "permitting" is awkward.
2nd the lack of "the" after the second permitting is wrong, as "permitting extraction" doesn't mean anything.

Den
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"Steam engines cannot allow the increase"
That is absurd


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Tough to eliminate D. The structure is not parallel here. 'water' is not parallel to 'extraction'
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I don't understand why it is B.

It seems like steam engines is permitting the drainage and extraction. I dont like C for the same reason. subject of "allow" is "steam engine"
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A, C, and E are out.
D has passive form of speech "allowing water to be drained out of mines", and there is a lack of proper parallelism between "allowing water to be drained out of mine" and "permitting extraction of deep layer of coal"
B doesn't have passive construction, and also it has correct parallelism, even the elimination of need to use permitting twice.
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DensetsuNo



This is a pretty hard question, it was the first mistake after a consistent number of right answers.
In my reasoning, I supposed that the steam engine couldn't be the subject of the phrase, since "a steam engine increased" sounded wrong to me, I liked more the idea of "the use of the steam engine increased", if anyone could elaborate I'd appreciate it \(:)\)

" The use of steam engines" is wrong, because the pronoun "them" in the opening modifier requires "steam engines" to be the subject.
(Yet your reasoning that "the use of steam engines increased" is better than " steam engines increased", but then the sentence would be grammatically wrong because of wrong pronoun reference - it is not wrong to say that " steam engines increased").
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I understand your explanation Mimster. Gerund has to be parallel with an action noun and not only with noun. But in option B the 'drainage of mines' sounds awkward. Whereas in option D, use of the term 'water' adds some meaning. Questions like these, it is tough to figure out whether to go by meaning or pure parallelism rules.!
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a) the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting.
b) steam engines increased coal production in eighteenth-century England by permitting the drainage of mines and the
c) steam engines in eighteenth-century England allowed an increase in coal production by permitting the drainage of mine water and (by) permitting
d) steam engines increased coal production in eighteenth-century England by allowing water to be drained out of mines and
e) eighteenth-century use of steam engines increased English coal production by draining mines and

bad modified :evil:

the drainage of mine water - mine water is not a coal mine

allowing water to be drained out of mines - you can allow an innanimate thing such as water to be drained out. ( water can't perform such task by itself )

steam engines in eighteenth-century England - remove the fluff and you will see a change in the meaning (it was never mentioned that steam engines were in England
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Located at the very coal mines that provided them with fuel, the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting extraction of deeper layers of coal.

(A) the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting
(B) steam engines increased coal production in eighteenth-century England by permitting the drainage of mines and the
(C) steam engines in eighteenth-century England allowed an increase in coal production by permitting the drainage of mine water and permitting
(D) steam engines increased coal production in eighteenth-century England by allowing water to be drained out of mines and does not fit to the rest of the sentence!
(E) eighteenth-century use of steam engines increased English coal production by draining mines and
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Located at the very coal mines that provided them with fuel, the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting extraction of deeper layers of coal.

(A) the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting - "steam engines" needed after "fuel,"
(B) steam engines increased coal production in eighteenth-century England by permitting the drainage of mines and the - CORRECT "the drainage" parallel to "the extraction"
(C) steam engines in eighteenth-century England allowed an increase in coal production by permitting the drainage of mine water and permitting - not parallel "by permitting the drainage.." with "permitting extraction"
(D) steam engines increased coal production in eighteenth-century England by allowing water to be drained out of mines and - "by allowing" not parallel to "extraction"
(E) eighteenth-century use of steam engines increased English coal production by draining mines and - "steam engines" needed after "fuel," - same as A
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IMO (B)
(1 Located at the ..... with fuel --> this modifier should modify steam engines. Neither to 'the use' nor to 'the eighteenth century'
(2) subject and object should be placed closer whenever its possible
Steam engine (subject) + increased (verb)+ Coal production(Objects) --- correct form
(3) parallelism : permitting drainage of mine water and permitting extraction of deeer layers.


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Main issue in the sentence is parallelism and wordiness .
Option B corrects these two flaws .
Option is pretty close but fails miserably for parallelism and use passive voice.
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Located at the very coal mines that provided them with fuel, the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting extraction of deeper layers of coal.

(A) the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting -- opening modifier error
(B) steam engines increased coal production in eighteenth-century England by permitting the drainage of mines and the
(C) steam engines in eighteenth-century England allowed an increase in coal production by permitting the drainage of mine water and permitting -- permitting is redundant here?
(D) steam engines increased coal production in eighteenth-century England by allowing water to be drained out of mines and
(E) eighteenth-century use of steam engines increased English coal production by draining mines and -- opening modifier error ; parallelism issue - by draining and extraction are not parallel

I chose D -- by allowing X and Y ; X = water to be drained out of mines, Y = extraction of deeper layers of coal . I believe both water and extraction here are nouns.

AjiteshArun ,mikemcgarry ,egmat ,GMATNinja , other experts - can you please help with eliminating options C and D ?
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Located at the very coal mines that provided them with fuel, the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting extraction of deeper layers of coal.

(A) the use of steam engines in eighteenth-century England increased coal production by allowing for mines to be drained of water and permitting -- opening modifier error
(B) steam engines increased coal production in eighteenth-century England by permitting the drainage of mines and the
(C) steam engines in eighteenth-century England allowed an increase in coal production by permitting the drainage of mine water and permitting -- permitting is redundant here?
(D) steam engines increased coal production in eighteenth-century England by allowing water to be drained out of mines and
(E) eighteenth-century use of steam engines increased English coal production by draining mines and -- opening modifier error ; parallelism issue - by draining and extraction are not parallel

I chose D -- by allowing X and Y ; X = water to be drained out of mines, Y = extraction of deeper layers of coal . I believe both water and extraction here are nouns.

AjiteshArun ,mikemcgarry ,egmat ,GMATNinja , other experts - can you please help with eliminating options C and D ?
Dear Skywalker18

I'm happy to respond. :-) I see that my intelligent fellow expert AjiteshArun already responded, but I will add a few more thoughts.

Many students, both native English speaker and non-native speakers, have the mistaken notion that parallelism is a grammatical structure. It is not. Parallelism is a logical structure, and the matching grammar merely serves to elucidate the underlying logical correspondences. Just because two nouns are the same part of speech does not mean they would be appropriate for parallelism. Here's a disastrous sentence:
I cooked dinner with seven carrots, with my biggest pot, and with my friend Chris.
At the level of grammar, I have three prepositional phrase of the form "with" + [noun], so the grammar is all matching, but of course the logical relationships are 100% different. That sentence is so bad it's comical.

Much in the same way, "water" and "extraction" indeed are both nouns, but they do not have a logically parallel relationship. The word "extraction" is an action-noun, describing a human activity, and "water" is a concrete noun, a substances that is the concern or focus of a human activity. By contrast, the OA, choice (B) has the two nouns in parallel "the drainage" and "the extraction": these are action nouns describing two human activities that would done in tandem and combine to result in greater coal production. In (B), there is a profound coherence between the grammar and the logic, whereas in (D), there's a mismatch between grammar and logic.

In a well written GMAT SC sentence, grammar & logic & rhetoric are all coherent--all work together to support meaning.

Does all this make sense?
Mike :-)
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Hi Bunuel,

This question is a prep ques. Can you please mark the same?
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