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Scientists have recently analyzed glass spherules that were created by

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Scientists have recently analyzed glass spherules that were created by  [#permalink]

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New post 16 May 2017, 12:08
3
00:00
A
B
C
D
E

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  55% (hard)

Question Stats:

51% (01:16) correct 49% (01:32) wrong based on 128 sessions

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Scientists have recently analyzed glass spherules that were created by the meteor impact near the Yucatan Peninsula in Mexico and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.

(A) and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(B) but have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(C) having concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(D) and have concluded that the infamous meteor arrived 300,000 years too early to kill the dinosaurs.
(E) and concludes that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.

Source: GMAT For Dummies
Difficulty Level: 700

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Re: Scientists have recently analyzed glass spherules that were created by  [#permalink]

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New post 16 May 2017, 12:23
SajjadAhmad wrote:
Scientists have recently analyzed glass spherules that were created by the meteor impact near the Yucatan Peninsula in Mexico and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.

(A) and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(B) but have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(C) having concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.
(D) and have concluded that the infamous meteor arrived 300,000 years too early to kill the dinosaurs.
(E) and concludes that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.

Source: GMAT For Dummies


The sentence is correct as is. hence Option A

(A) and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.------->Correct
(B) but have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.------->"but" is incorrect here. it represents contrast
(C) having concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.------->"having" is incorrect. It modifies immediate noun
(D) and have concluded that the infamous meteor arrived 300,000 years too early to kill the dinosaurs.------->"to kill the dinosaurs." is illogical
(E) and concludes that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs."Concludes" Simple present is incorrect here.
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Re: Scientists have recently analyzed glass spherules that were created by  [#permalink]

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New post 17 May 2017, 05:14
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Scientists have recently analyzed glass spherules that were created by the meteor impact near the Yucatan Peninsula in Mexico and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs.

(A) and have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs. (Correct)
(B) but have concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs. (Sentence does not show contrast)
(C) having concluded that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs. (Scientists have analyzed something after concluding the event. Both events are separate)
(D) and have concluded that the infamous meteor arrived 300,000 years too early to kill the dinosaurs. (To correctly show the past event, perfect tense should be used)
(E) and concludes that the infamous meteor arrived 300,000 years too early to have killed the dinosaurs. (The second part of the sentence should also be in perfect form)

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Re: Scientists have recently analyzed glass spherules that were created by  [#permalink]

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New post 25 Jul 2017, 07:52
we need and have concluded.
right away, only A and D remain.
to have killed - properly relates a cause-effect relation.
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Re: Scientists have recently analyzed glass spherules that were created by  [#permalink]

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New post 15 Apr 2019, 12:33
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Scientists have recently analyzed glass spherules that were created by   [#permalink] 15 Apr 2019, 12:33
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