Mo2men wrote:An analysis of tree bark all over the globe shows that chemical insecticides have often spread thousands of miles from where they were originally used.
A. that chemical insecticides have often spread thousands of miles from where they were originally used
B. that chemical insecticides have spread, often thousands of miles from their original use
C. chemical insecticides, having often spread thousands of miles from where they were used originally
D. chemical insecticides, often spreading thousands of miles from where their original use
E. chemical insecticides, often spreading thousands of miles from where they were originally used
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B:
miles from their original use
It is illogical to discuss the distance from a USE.
Eliminate B.
C, D and E:
An analysis shows...chemical insecticides.
Conveyed meaning:
An analysis shows the EXISTENCE of chemical insecticides.
Not the intended meaning.
According to the original sentence, an analysis shows not the insecticides themselves but what the insecticides HAVE DONE:
An analysis shows...that chemical insecticides HAVE OFTEN SPREAD.
Eliminate C, D and E.
The correct answer is
A.
OA:
Chemical insecticides have often spread thousands of miles from where they were originally used.
Here, the portions in blue are RESTRICTIVE MODIFIERS that circumscribe how chemicals insecticides
have spread.
They have spread in ONE PARTICULAR WAY:
often...thousands of miles from where they were originally used.
In the OA, it is possible that chemical insecticides have not spread in any other way.
B:
Chemical insecticides have spread, often thousands of miles from their original use.
Here, the portion in red is a NON-RESTRICTIVE MODIFIER that does NOT circumscribe how chemical insecticides have spread.
As a result, the core of the sentence -- the portion in blue -- conveys that chemicals insecticides have spread IN GENERAL .
In other words, chemical insecticides have spread not in one particular way but in MANY WAYS.
The modifier in red merely conveys one of the many ways in which chemical insecticides have spread:
often...thousand of miles from their original use.
Since the meaning conveyed by the original sentence -- that chemical insecticides have spread in one particular way -- is logical, eliminate any answer choice that does not convey this meaning.
Eliminate B.
Last edited by
GMATGuruNY on Mon Jul 03, 2017 8:35 pm, edited 1 time in total.
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