Which of the following best completes the passage below? : GMAT Critical Reasoning (CR)
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# Which of the following best completes the passage below?

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VP
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Which of the following best completes the passage below? [#permalink]

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29 Jan 2008, 05:29
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Which of the following best completes the passage below?
Monarch butterflies, whose average life span is nine months, migrate from the midwestern United States to selected forests outside Mexico City. It takes at least three generations of monarchs to make the journey, so the great-great-grandchildren who finally arrive in the Mexican forests have never been there before. Yet they return to the same trees their forebears left. Scientists theorize that monarchs, like homing pigeons, map their routes according to the earth’s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly trees” in the Mexican forests. If the butterflies are either especially attracted to the grove with the transmitter or especially repelled by it, lepidopterists will have evidence that______
(A) monarch butterflies have brains, however minuscule
(B) monarch butterflies are sensitive to electricity
(C) low-voltage electricity can affect butterflies, whether positively or adversely
(D) monarchs map their routes according to the earth’s electromagnetic fields
(E) monarchs communicate in intergenerationally via electromagnetic fields
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Re: cr 1000 test 5 5 [#permalink]

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29 Jan 2008, 06:09
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B
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Re: cr 1000 test 5 5 [#permalink]

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29 Jan 2008, 06:40
rafiaiqbal wrote:
B

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Re: cr 1000 test 5 5 [#permalink]

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30 Jan 2008, 00:41
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Expert's post
E

Which of the following best completes the passage below?

Monarch butterflies, whose average life span is nine months, migrate from the midwestern United States to selected forests outside Mexico City. It takes at least three generations of monarchs to make the journey, so the great-great-grandchildren who finally arrive in the Mexican forests have never been there before. Yet they return to the same trees their forebears left. Scientists theorize that monarchs, like homing pigeons, map their routes according to the earth’s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly trees” in the Mexican forests. If the butterflies are either especially attracted to the grove with the transmitter or especially repelled by it, lepidopterists will have evidence that______

electromagnetic fields influence on butterflies' behavior.

(A) monarch butterflies have brains, however minuscule - out of scope
(B) monarch butterflies are sensitive to electricity - electricity is not electromagnetic field
(C) low-voltage electricity can affect butterflies, whether positively or adversely - it does not matter how. Electricity is not electromagnetic field
(D) monarchs map their routes according to the earth’s electromagnetic fields - contradict to "As a first step in testing this theory"
(E) monarchs communicate in intergenerationally via electromagnetic fields - correct. It contains "electromagnetic fields" and "sensitivity" of monarchs to them.
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Re: cr 1000 test 5 5 [#permalink]

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30 Jan 2008, 01:41
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(A) monarch butterflies have brains, however minuscule - out of scope
(B) monarch butterflies are sensitive to electricity - correct
(C) low-voltage electricity can affect butterflies, whether positively or adversely - it does not matter how. close to B however points to generic butterflies
(D) monarchs map their routes according to the earth’s electromagnetic fields - this they r trying to prove with the first step
(E) monarchs communicate in intergenerationally via electromagnetic fields - interprets too much
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Re: cr 1000 test 5 5 [#permalink]

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10 Feb 2008, 18:26
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B?
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Re: cr 1000 test 5 5 [#permalink]

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10 Feb 2008, 19:08
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D it seems...

E requires too much extrapolation
Re: cr 1000 test 5 5   [#permalink] 10 Feb 2008, 19:08
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