Gmat prep SC...

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Gmat prep SC...

by [email protected] » Wed Apr 04, 2012 6:13 am
The relationship between cell phone use and the incidence of brain tumors is still unclear, this is because some studies show a causal relationship while others do not.

A] is still unclear, this is because some studies show

B] is still unclear; some studies show

C] are still unclear because some studies show

D] is still unclear because: some studies show

E] is still unclear; the reason is that some studies show


The OA is B... I did not get why...

Honestly this seems to be a causal sentence. And in a causal sentence, a conjunction or 'the reason is that' delivers the intended meaning. But the explanation given is something else only.

The explanation states that a ; (semicolon) is used to join two independent clauses which make sense and can stand alone ie both the sentences having a subject and verb of its own and can stand alone.

According to me:

Option A: 'this is because' after a , is not required, it makes the sentence wordy and redundant.
A direct 'because' is preferable.

Option C: wrong verb used. Subject verb agreement error...

Option D: because and ; both is wordy and not required. anyone of them is required.


Option E: makes sense to me as 'the reason is that' logically connects to the preceding clause as this is a causal sentence.

Between option B and E, I chose E and got it wrong as the OA is B...


Could any of you please help me in understanding what parameter to choose between a semicolon and a causal statement. Two independent sentences can never deliver a causal statement and a semicolon will exist only for two independent sentences...

This is 700 level question got it from Gmatprep notes...
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by GMATGuruNY » Wed Apr 04, 2012 7:21 am
[email protected] wrote:The relationship between cell phone use and the incidence of brain tumors is still unclear, this is because some studies show a causal relationship while others do not.

A] is still unclear, this is because some studies show

B] is still unclear; some studies show

C] are still unclear because some studies show

D] is still unclear because: some studies show

E] is still unclear; the reason is that some studies show
This SC is discussing the relationship between cell phone use and the incidence of brain tumors. A, C, D and E imply -- incorrectly -- that the results of some studies are CAUSING the relationship to be unclear. Not so. While these results are a SIGN that the relationship is unclear, they are not CAUSING the relationship to be unclear. Eliminate A, C, D, and E.

The correct answer is B.

Other reasons to eliminate answers:

In A, this lacks a clear antecedent. Also, a comma is being used to connect two complete sentences, resulting in a comma splice. If a comma can be replaced by a period, eliminate the answer choice. Eliminate A.

In C, are (plural) does not agree with the relationship (singular). Eliminate C.

In D, the colon is preceded by a sentence fragment. A colon on the GMAT must be preceded by a complete sentence. Eliminate D.

Only B and E remain. Since B has no clear error and is more concise, eliminate E and choose B.
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by [email protected] » Thu Apr 05, 2012 12:00 am
This SC is discussing the relationship between cell phone use and the incidence of brain tumors. A, C, D and E imply -- incorrectly -- that the results of some studies are CAUSING the relationship to be unclear. Not so. While these results are a SIGN that the relationship is unclear, they are not CAUSING the relationship to be unclear. Eliminate A, C, D, and E.


Honestly I did not understand your explanation on this particular sentence. I still feel that the OA should be E and not B. The sentence could be as follows:


The relationship between cell phone use and the incidence of brain tumors is still unclear because some some studies show a causal relationship while others do not.

Hence the correct sentence.

This means that the second clause should be the reason of the first clause. So if they are acting as independent, they should be able to deliver the intending the meaning of the sentence.

I feel the correct answer is E and not B...
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by GMATGuruNY » Thu Apr 05, 2012 3:45 am
[email protected] wrote:This SC is discussing the relationship between cell phone use and the incidence of brain tumors. A, C, D and E imply -- incorrectly -- that the results of some studies are CAUSING the relationship to be unclear. Not so. While these results are a SIGN that the relationship is unclear, they are not CAUSING the relationship to be unclear. Eliminate A, C, D, and E.


Honestly I did not understand your explanation on this particular sentence. I still feel that the OA should be E and not B. The sentence could be as follows:


The relationship between cell phone use and the incidence of brain tumors is still unclear because some some studies show a causal relationship while others do not.

Hence the correct sentence.

This means that the second clause should be the reason of the first clause. So if they are acting as independent, they should be able to deliver the intending the meaning of the sentence.

I feel the correct answer is E and not B...
Here is the meaning conveyed by E. Note the words in upper case type:

The conflicting results of the studies are THE REASON that the relationship between cellphone use and the incidence of brain tumors is still unclear.


The implication here is that THERE ARE NO OTHER REASONS that the relationship is still unclear and that the results of the studies are CAUSING the relationship to remain unclear. Not so: while the studies did not solve the mystery, they are not CAUSING it.
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by Bill@VeritasPrep » Thu Apr 05, 2012 6:33 am
I think you can eliminate E for the same reason as you eliminated A. Like "this is because," using "the reason is that" is overly wordy. A semicolon is used to link two related independent clauses, so adding additional wording to show that relationship is unnecessary.
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