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# Most efforts to combat such mosquito-borne like malaria and dengue...

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Intern
Joined: 26 Apr 2019
Posts: 3
Most efforts to combat such mosquito-borne like malaria and dengue...  [#permalink]

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21 Jul 2019, 14:52
00:00

Difficulty:

15% (low)

Question Stats:

86% (01:02) correct 14% (01:53) wrong based on 28 sessions

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Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A) like malaria and dengue have focused either on the vaccination of humans or on exterminating
B) like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C) as malaria and dengue have focused on either vaccinating humans or on exterminating
D) as malaria and dengue have focused on either vaccinating of humans or on extermination of
E) as malaria and dengue have focused on either vaccinating humans or exterminating

QUESTION: I don’t understand why it the alternative C is wrong.
Duke & Cornell Moderator
Joined: 29 May 2018
Posts: 86
Location: India
GMAT 1: 700 Q48 V38
GMAT 2: 720 Q49 V39
GPA: 4
Re: Most efforts to combat such mosquito-borne like malaria and dengue...  [#permalink]

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21 Jul 2019, 20:04
Hi,
C is wrong because it changes the meaning of the sentence. It implies that most efforts have focussed exclusively on either of the options.

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Manager
Joined: 31 May 2018
Posts: 183
Location: United States
Concentration: Finance, Marketing
Re: Most efforts to combat such mosquito-borne like malaria and dengue...  [#permalink]

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21 Jul 2019, 20:50
laisborges wrote:
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A) like malaria and dengue have focused either on the vaccination of humans or on exterminating
B) like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C) as malaria and dengue have focused on either vaccinating humans or on exterminating
D) as malaria and dengue have focused on either vaccinating of humans or on extermination of
E) as malaria and dengue have focused on either vaccinating humans or exterminating

QUESTION: I don’t understand why it the alternative C is wrong.

hi

placement of the preposition and the correlative conjunctions

(1) either on …. or … (once inside = incorrect)

(2) either on …. or on … (twice inside = correct)

(3) on either …. or on … (once outside, once inside = incorrect)

(4) on either …. or … (once outside = correct)
Math Expert
Joined: 02 Sep 2009
Posts: 57030
Re: Most efforts to combat such mosquito-borne like malaria and dengue...  [#permalink]

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21 Jul 2019, 21:24
laisborges wrote:
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A) like malaria and dengue have focused either on the vaccination of humans or on exterminating
B) like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C) as malaria and dengue have focused on either vaccinating humans or on exterminating
D) as malaria and dengue have focused on either vaccinating of humans or on extermination of
E) as malaria and dengue have focused on either vaccinating humans or exterminating

QUESTION: I don’t understand why it the alternative C is wrong.

Discussed here: https://gmatclub.com/forum/most-efforts ... fl=similar

THIS TOPIC IS LOCKED AND ARCHIVED.
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Re: Most efforts to combat such mosquito-borne like malaria and dengue...   [#permalink] 21 Jul 2019, 21:24
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