Although some officials noted that using machines for : GMAT Sentence Correction (SC)
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# Although some officials noted that using machines for

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Joined: 14 May 2007
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Although some officials noted that using machines for [#permalink]

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14 May 2007, 16:09
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Although some officials noted that using machines for farming in China costs more than traditional hand cultivation, the mechanization of farming in the village of Long Bow doubled the corn yield while the previous year’s costs were cut in half.
(A) mechanization of farming in the village of Long Bow doubled the corn yield while the previous year’s costs were cut in half
(B) mechanization of farming in the village of Long Bow doubled the corn yield while cutting costs to half those of the previous year
(C) mechanization of farming in the village of Long Bow doubled the corn yield as cost were cut to half of the previous year’s
(D) farming mechanization in the village of Long Bow doubled the corn yield as it cut in half the previous year’s costs
(E) farming mechanization in the village of Long Bow doubled the corn yield while costs were cut to half that of the previous year

B vs. E?? (in E, is "that of" wrong?)
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14 May 2007, 16:21
In E, costs is plural and hence those is required.
14 May 2007, 16:21
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