According to a recent study, hand sanitizers require a 60 pe

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BTGmoderatorDC: Moderator; Posts: 7187; Joined: Thu Sep 07, 2017 4:43 pmFollowed by: 23 members

by BTGmoderatorDC » Sun Feb 24, 2019 10:33 pm

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According to a recent study, hand sanitizers require a 60 percent minimum alcohol concentration for the killing of most harmful bacteria and viruses.

(A) require a 60 percent minimum alcohol concentration for the killing of
(B) require that there be a 60 percent minimum alcohol concentration to kill
(C) require that a 60 percent minimum alcohol concentration be present to kill
(D) require a 60 percent minimum alcohol concentration to kill
(E) require that there be a 60 percent minimum alcohol concentration for the killing of

OA D

Source: Manhattan Prep

Source: Beat The GMAT — Sentence Correction | Sun Feb 24, 2019 10:33 pm

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ceilidh.erickson: GMAT Instructor; Posts: 2095; Joined: Tue Dec 04, 2012 3:22 pmFollowed by: 247 members; Thanked: 1443 times

by ceilidh.erickson » Tue Feb 26, 2019 8:36 am

This question is testing IDIOMS.

The correct idiom in this case is "require ___ to do ____."

(A) require a 60 percent minimum alcohol concentration for the killing of
- "for the killing of" is unnecessarily wordy. "To kill" is preferred.

(B) require that there be a 60 percent minimum alcohol concentration to kill
- "require that there be" is unnecessarily wordy / redundant.

(C) require that a 60 percent minimum alcohol concentration be present to kill
- "require that __ be present" is unnecessarily wordy / redundant.

(D) require a 60 percent minimum alcohol concentration to kill
- correct

(E) require that there be a 60 percent minimum alcohol concentration for the killing of
- "require that there be" is unnecessarily wordy / redundant.
- "for the killing of" is unnecessarily wordy. "To kill" is preferred.

The correct answer is D.

Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education

vietnam47: Master | Next Rank: 500 Posts; Posts: 110; Joined: Thu Apr 26, 2018 11:19 pmFollowed by: 1 member

by vietnam47 » Sat Aug 17, 2019 8:31 am

if you see to do/doing, give them tense of agents, who perform their actions.
in d, to do refer to hand sanitizer. this meaning is most logic.
in c and b, to do refer to concentration. this is not intended meaning
for the killing refer to no noun in the sentence. this means hand sanitizer dose not do killing. wrong

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