Adequate sleep

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EricKryk: Senior | Next Rank: 100 Posts; Posts: 83; Joined: Tue Mar 31, 2009 11:03 am; Thanked: 3 times

by EricKryk » Sat Feb 15, 2014 4:26 pm

Without adequate amounts of sleep, people's newly acquired skills and also new factual information may not get properly encoded into their memory circuits.

(A) Without adequate amounts of sleep, people's newly acquired skills and also

(B) Without the adequate amount of sleep they need, people's newly acquired skills and even

(C) If they do not have adequate amounts of sleep, people's newly acquired skills and even

(D) If people do not get adequate amounts of sleep, newly acquired skills and even

(E) If people do not get the adequate amount of sleep they need, newly acquired skills and also

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Source: Beat The GMAT — Sentence Correction | Sat Feb 15, 2014 4:26 pm

Patrick_GMATFix: GMAT Instructor; Posts: 1052; Joined: Fri May 21, 2010 1:30 amFollowed by: 98 members; Thanked: 335 times

by Patrick_GMATFix » Sat Feb 15, 2014 4:57 pm

Modifiers are incorrectly used in A, B & C (modifiers should target People, not their skills). E commits a redundancy ("the adequate sleep they need") and uses "also" which is less precise in meaning than "even". The full solution below is taken from the GMATFix App.

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[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Sun Feb 16, 2014 9:11 pm

Hi EricKryk,

When a GMAT SC is built around commas, the primary grammar rule involved in the sentence is usually modification or parallelism. In this SC, it's modification.

By definition, any modifier (whether it's a single word or an entire phrase) MUST modify the thing next to it. You can quickly run through the first parts of each of the answer choices and see that the modification is incorrect:

A: the opening phrase should modify "people", but instead modifies "people's...skills"
B: the opening phrase should modify "people", but instead modifies "people's...skills"
C: the opening phrase should modify "people", but instead modifies "people's...skills"

Between D and E, E presents a couple of redundant phrases that make this answer incorrect: the pronoun "they" is redundant; the word "also" is redundant to the word "and."

Final Answer: D

GMAT assassins aren't born, they're made,
Rich

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