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# New techniques in thermal-scanning photography, a process

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New techniques in thermal-scanning photography, a process [#permalink]

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09 Dec 2008, 07:23
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55% (hard)

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57% (01:10) correct 43% (01:13) wrong based on 1519 sessions

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New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.

(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before
(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river
[Reveal] Spoiler: OA

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09 Dec 2008, 09:37
B

techniques (plural).........make it.....

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09 Dec 2008, 18:42
C
have made it possible....than ever before

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11 Dec 2008, 11:19
IMO C

(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before (Techniques - should be make)
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before (in greater detail is wrongly placed)
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river ---- Correct
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before (make possible the study is wrong)
(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river ---- (Techniques ----should be have)

Last edited by jahnaviyeruva on 11 Dec 2008, 17:47, edited 1 time in total.

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13 Feb 2009, 20:35
OA is C

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New techniques in thermal-scanning photography, a process [#permalink]

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09 Aug 2009, 12:55
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New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.
(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before
(E) has made it possible than ever before to study in greater detail the effects of calefaction, or warming, of a river

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09 Aug 2009, 14:32
C?

1- Subject: New techniques -> A,E out
2- greater requires than -> B out
3- D is, as the OG would say, AWKWARD
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09 Aug 2009, 23:55
Than is there in B.
Why do we require perfect tense here?
IMO B

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10 Aug 2009, 00:04
IMO C
A & E - have subj-verb agreement error. New techniques -- have/make
B - not sure if it is out rightly wrong to have than ever before at the end of the sentence, but I would certainly prefer to have it just after in greater detail
There is one more way to look at this sentence
New techniques in thermal-scanning photography, a process that records radiation from surface areas, make it possible to study, [strike]in greater detail,[/strike] the effects of calefaction, or warming, of a river than ever before. This sentence is incomplete.
D - wordy and awkward.

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10 Aug 2009, 01:30
angel2009 wrote:
Than is there in B.
Why do we require perfect tense here?
IMO B

You are right, but IMO if you look carefully you will observe that THAN in B is attached to THE EFFECTS: "the effects [...] than ever.." which makes no sense.

IMO the sentence would be equally correct with MAKE or MADE, but HAVE MADE is coherent providing that the research has been completed recently.

So the key is the subject and the placement of THAN.
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10 Aug 2009, 02:16
C is clear and concise. B unnecessarily complicates by adding a few commas

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09 Jun 2010, 06:13
I went with option B bt OA says it is C.

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09 Jun 2010, 07:09
I initially picked C but then the construction "...in greater detail than ever before the effects..." didn't sound very pleasing to me. And so I picked D...

Can anybody tell me what is wrong with D?

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09 Jun 2010, 08:38
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Can anybody explain that why is option B not correct and C is the answer.
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09 Jun 2010, 08:55
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gaurav2k101 wrote:
Can anybody explain that why is option B not correct and C is the answer.

(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before

This is a subtle case of a misplaced modifier. We need "than ever before" to be directly linked to "study in greater detail"

Here it sounds more like we're saying "The effects of calefaction or warming of a river than ever before" which creates a disconnect from the intended comparison.

The excessive use of commas to create modifiers within modifiers is also awkward, though this is a secondary problem.

Placement of phrases is an important factor, and bears a higher priority than style or wordiness.

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09 Jun 2010, 11:51
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Yes i like the post. I will like to add one more thing -

We use simple present tense for - facts, habitual action.
e.g Sun rises in the East ( a fact)
Ron jogs 3 miles every morning (a habit)

I don't see any of these cases w.r.t "New techniques in thermal-scanning photography".
The statement is telling me that such new techniques which don't exist sometime in the past now exist and are useful to study the effects of blah blah in greater detail. The use of simple present tense make will NOT be correct.

blah blah = the effects of calefaction, or warming, of a river

Hence I go with present perfect - "have made it possible to study". C it is.

AbhayPrasanna wrote:
gaurav2k101 wrote:
Can anybody explain that why is option B not correct and C is the answer.

(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before

This is a subtle case of a misplaced modifier. We need "than ever before" to be directly linked to "study in greater detail"

Here it sounds more like we're saying "The effects of calefaction or warming of a river than ever before" which creates a disconnect from the intended comparison.

The excessive use of commas to create modifiers within modifiers is also awkward, though this is a secondary problem.

Placement of phrases is an important factor, and bears a higher priority than style or wordiness.

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09 Jun 2010, 22:43
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can you guys please clarify as to what does "IT" refers to in option C.

have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
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09 Jun 2010, 22:53
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mustdoit wrote:
can you guys please clarify as to what does it refers to in option C.

have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river

Here the "it" is used as a pronoun to anticipate "the effects..."

"have made the effects of (...) possible to study in greater detail..."

The pronoun is introduced before the antecedent.

eg. I love it when the sky is clear.
or, Your abstruse approach makes it difficult to understand the solution.

We are describing the antecedent using a pronoun modifier. This is perfectly acceptable.

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09 Jun 2010, 23:16
mustdoit wrote:
can you guys please clarify as to what does "IT" refers to in option C.

have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river

Sorry. I was watching this discussion. There is a nice discussion about the usage of "it" on this thread -

sc-australia-76438.html?highlight=SaraiGMAXonline

As explained by GMAT Instructor.

1. It can have a referrent
2. Or it can be used as expletive (place holder), which doesnt refer to anything

My 2 cents -
What we should worry about is whether "it" is ambiguous. Unless that happens don't worry too much.

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16 Jun 2010, 06:28
One way to understand why B is wrong is that B has so many commas, you can likely to eliminate immediately in Gmat since Gmat looks for short, precise and clear sentence

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Re: SC ever before   [#permalink] 16 Jun 2010, 06:28

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