The population of peregrine falcons declined rapidly during : GMAT Critical Reasoning (CR)
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# The population of peregrine falcons declined rapidly during

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The population of peregrine falcons declined rapidly during [#permalink]

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01 Apr 2004, 06:17
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The population of peregrine falcons declined rapidly during the
1950's and 1960's and reached an all-time low in the early 1970's.
The decline was attributed by scientists to the widespread use of the
pesticide DDT in rural areas.

Which of the following, if true, gives the strongest support to the
scientits claim?

(A) DDT was not generally in use in areas devoted to heavy industry.
(B) In the time since the use of DDT was banned in 1972, the
population of peregrine falcons has been steadily increasing. (C)
Peregrine falcons, like other birds of prey, abandon eggs that have
fallen out of the nest, even if the eggs remain intact.
(D) Starlings, house sparrows, and blue jay-birds the peregrine
falcon prey on-were not adversely affected by DDT in their habitats.
(E) Other birds of prey, such as the osprey, the bald eagle, and the
brown pelican, are found in the same areas as is the peregrine falcon.
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01 Apr 2004, 12:33
although ALL of the answers, including B, can be refuted, I agree that B is best.
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01 Apr 2004, 14:01
B is better than other choices...but we can also say just because it started to increase after the DDT was banned does not mean that DDT was the main reason....
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01 Apr 2004, 14:05
monarc wrote:
B is better than other choices...but we can also say just because it started to increase after the DDT was banned does not mean that DDT was the main reason....

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Paul

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03 Apr 2004, 21:50
yep OA is B.
03 Apr 2004, 21:50
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# The population of peregrine falcons declined rapidly during

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