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Leaching.

by sumittaneja009 » Mon Dec 29, 2008 10:05 pm
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.
(A) as a method of the extraction of minerals, it was well established
(B) as a method of the extraction of minerals well established
(C) was a well-established method of mineral extraction
(D) was a well-established method of extracting mineral that was
(E) had been a method of mineral extraction, well established

OA is C

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by ronniecoleman » Tue Dec 30, 2008 2:52 am
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.
(A) as a method of the extraction of minerals, it was well established
awkward construction: it refers to whom...

(B) as a method of the extraction of minerals well established
proper verb is required..
(C) was a well-established method of mineral extraction
Bingo..
(D) was a well-established method of extracting mineral that was
that illogically modifies mineral

(E) had been a method of mineral extraction, well established
wrong use of tense
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by er_priyankajolly » Wed Aug 18, 2010 11:16 pm
This is a GMAT Prep2 Question

Can anyone explain me why "Had been in E is incorrect".

I have read in a few posts that "well established" is incorrectly modifying mineral extraction. However, i believe that its modifying method of mineral extaction.

please correct me if i am wrong

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by crack30 » Sat Sep 24, 2011 2:25 am
can some one explain as eaarly as 18c should modify what, in logic? and why Dis wrong?

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by luiscarlos59 » Sun Mar 04, 2012 2:50 pm
D is wrong because

Leaching...was a method of extracting mineral that was as early as 18c..

No sense at all.


Leaching...was a method of mineral extraction as early as 18c..

Correct

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by krusta80 » Sun Mar 04, 2012 3:18 pm
crack30 wrote:can some one explain as eaarly as 18c should modify what, in logic? and why Dis wrong?
Choice C is much more to the point. It's less wordy and avoids using an unnecessary gerund.

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by krusta80 » Sun Mar 04, 2012 3:20 pm
er_priyankajolly wrote:This is a GMAT Prep2 Question

Can anyone explain me why "Had been in E is incorrect".

I have read in a few posts that "well established" is incorrectly modifying mineral extraction. However, i believe that its modifying method of mineral extaction.

please correct me if i am wrong
You only want to use had been, which is the past perfect, is the rest of that clause refers to actions taken during the past as well.

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by GmatKiss » Mon Mar 05, 2012 2:20 am
sumittaneja009 wrote:Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.
(A) as a method of the extraction of minerals, it was well established
(B) as a method of the extraction of minerals well established
(C) was a well-established method of mineral extraction - Perfect
(D) was a well-established method of extracting mineral that was - Passive
(E) had been a method of mineral extraction, well established

OA is C

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by mankey » Mon Mar 05, 2012 11:01 pm
Please explain, what is the problem with D?

Regards

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by avik.ch » Tue Mar 06, 2012 12:33 am
mankey wrote:Please explain, what is the problem with D?

Regards
- Prefer a dedicated noun of a verb over its gerund. For some verb when dedicated noun do not exists, use its gerund form.

- What is "that" referring to "method of...." or "extracting mineral" ? there is an ambiguity.

Hope this helps !!