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# Research shows that babies begin to open and close their hands

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SC Moderator
Joined: 25 Sep 2018
Posts: 724
Location: United States (CA)
Concentration: Finance, Strategy
GPA: 3.97
WE: Investment Banking (Investment Banking)
Research shows that babies begin to open and close their hands  [#permalink]

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29 Jan 2020, 13:16
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Difficulty:

5% (low)

Question Stats:

91% (00:52) correct 9% (00:55) wrong based on 33 sessions

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Research shows that babies begin to open and close their hands at around two months and continue to develop fine motor skills as they age.

A. that babies begin to open and close their hands at around two months and continue to develop

B. that babies had begun to open and close their hands at around two months and had been developing

C. that the opening and closing of their hands begins for babies at around two months and they continue to develop

D. babies to begin to open and close their hands at around two months and continuing to develop

E. babies to have begun opening and closing their hands at around two months and have been developing

Verb-Tense Series

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Joined: 10 Jul 2017
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Location: India
GMAT Date: 11-01-2019
Re: Research shows that babies begin to open and close their hands  [#permalink]

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29 Jan 2020, 23:25
Dear Friends,

Here is a detailed explanation to this question-

Abhi077 wrote:
Research shows that babies begin to open and close their hands at around two months and continue to develop fine motor skills as they age.

A. that babies begin to open and close their hands at around two months and continue to develop

B. that babies had begun to open and close their hands at around two months and had been developing

C. that the opening and closing of their hands begins for babies at around two months and they continue to develop

D. babies to begin to open and close their hands at around two months and continuing to develop

E. babies to have begun opening and closing their hands at around two months and have been developing

Choice A: This answer choice maintains proper tense use, conveys the intended meaning of the sentence, and is quite concise. Thus, this answer choice is correct.

Choice B: This answer choice incorrectly uses the past perfect tense to refer to both actions described in the sentence; the ages at which babies begin to open and close their hands and the fact that they continue to develop fine motor skills as they age are universal facts, and statements conveying them must be in the simple present tense. Thus, this answer choice is incorrect.

Choice C: This answer choice is highly awkward due to the use of the passive voice and the use of the gerund phrase "the opening and closing"; this answer choice implies that the opening and closing of babies' hands is an autonomous function that babies do not control. Thus, this answer choice is incorrect.

Choice D: This answer choice incorrectly uses the present continuous tense to refer to a statement of universal truth. Thus, this answer choice is incorrect.

Choice E: This answer choice incorrectly uses the present perfect continuous tense to refer to the statement of universal truths. Thus, this answer choice is incorrect.

Hence, A is the best answer choice.

To understand the concept of "Past Perfect Tense - Use of Had on GMAT", you may want to watch the following video (~2 minutes):

To understand the concept of "Present Perfect Continuous Tense on GMAT", you may want to watch the following video (~1 minute):

To understand the concept of "Simple Tenses on GMAT", you may want to watch the following video (~1 minute):

All the best!
Experts' Global Team
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Re: Research shows that babies begin to open and close their hands   [#permalink] 29 Jan 2020, 23:25
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