According to surveys by the National Institute on Drug : GMAT Sentence Correction (SC)
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# According to surveys by the National Institute on Drug

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Manager
Joined: 06 Oct 2004
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According to surveys by the National Institute on Drug [#permalink]

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19 Mar 2005, 13:30
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According to surveys by the National Institute on Drug Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey.
(A) doubling those reported in the 1977 survey

(B) to double the number the 1977 survey reported

(C) twice those the 1977 survey reported

(D) twice as much as those reported in the 1977 survey

(E) twice the number reported in the 1977 survey[/u]
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Joined: 07 Jul 2004
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20 Mar 2005, 18:02
(A) doubling those reported in the 1977 survey
- particple 'doubling' suggests an action that is still taking place

(B) to double the number the 1977 survey reported
- 'to double' is wrong

(C) twice those the 1977 survey reported
- pronoun 'those' is wrong

(D) twice as much as those reported in the 1977 survey
- 'those' is not clear what it modifies

(E) twice the number reported in the 1977 survey
- I'll take E. The number could refer to the percentage figures.
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20 Mar 2005, 19:44
E too but C was a potential choice for me, I just chose E because E sounds better and seems to have a better grammar structure...however can someone explain why C is incorrect ? because of "those" ?
20 Mar 2005, 19:44
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