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Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals
(B) If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals
(C) If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals
(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective
(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place
Meaning is crucial to solving this problem:Understanding the intended meaning is key to solving this question; the intended meaning of this sentence is that certain pesticides can become ineffective if used repeatedly in the same place, and one reason for this phenomenon is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
Concepts tested here: Meaning + Modifiers + Comparison• In the “phrase + comma + noun” and “noun + comma + phrase” constructions, the phrase must correctly modify the noun; this is one of the most frequently tested concepts on GMAT sentence correction.
• A comparison must always be made between similar elements.
A: Correct. This answer choice uses the phrase "the finding that", conveying the intended meaning - that
the fact that there are much larger populations of pesticide-degrading microbes in certain soils than in others suggests one reason for the given phenomenon. Further, Option A avoids the modifier error seen in Options B, C, and D, as it makes use of neither the “phrase + comma + noun” or the “noun + comma + phrase” construction, thus conveying the intended meaning - that
the pesticides are used repeatedly in the same place. Additionally, Option A correctly compares the prepositional phrases "in soils with a relatively long history of pesticide use" and "in soils that are free of such chemicals".
B: This answer choice incorrectly uses "If used repeatedly in the same place" to modify "one reason", illogically suggesting that
one reason for the given phenomenon is used repeatedly in the same place; the intended meaning is that
the pesticides are used repeatedly in the same place; remember, in the “phrase + comma + noun” and “noun + comma + phrase” constructions, the phrase must correctly modify the noun.
C: This answer choice incorrectly uses "If used repeatedly in the same place" to modify "one reason", illogically suggesting that
one reason for the given phenomenon is used repeatedly in the same place; the intended meaning is that
the pesticides are used repeatedly in the same place; remember, in the “phrase + comma + noun” and “noun + comma + phrase” constructions, the phrase must correctly modify the noun. Further, Option C incorrectly compares the prepositional phrase "in soils with a relatively long history of pesticide use" to the pronoun phrase "those that are free of such chemicals"; remember, a comparison can only be made between similar things.
D: This answer choice incorrectly modifies "one reason" with "if used repeatedly in the same place", illogically suggesting that
one reason for the given phenomenon is used repeatedly in the same place; the intended meaning is that
the pesticides are used repeatedly in the same place; remember, in the “phrase + comma + noun” and “noun + comma + phrase” constructions, the phrase must correctly modify the noun.
E: This answer choice subtly alters the meaning of the sentence through the phrase "The finding of"; the construction of this phrase incorrectly implies that the
act of finding much larger populations of pesticide-degrading microbes in certain soils than in others suggests one reason for the given phenomenon; the intended meaning is that
the fact that there are much larger populations of pesticide-degrading microbes in certain soils than in others suggests one reason for the given phenomenon.
Additional Note: Please note the difference between "the finding that" and "the finding of": in "the finding of", "finding" refers to the act of literally finding something, and in "the finding that" "finding" refers to the results of an investigation or to certain information that has been uncovered.
Hence, A is the best answer choice.To understand the concept of "Phrase Comma Subject" and "Subject Comma Phrase" on GMAT, you may want to watch the following video (~1minute):
All the best!
Experts' Global Team