After determining the levels of calcium carbonate and the : GMAT Sentence Correction (SC)
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# After determining the levels of calcium carbonate and the

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Director
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After determining the levels of calcium carbonate and the [#permalink]

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09 Jun 2007, 23:31
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75% (01:56) correct 25% (01:13) wrong based on 176 sessions

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After determining the levels of calcium carbonate and the types of fossilized algae present in core samples taken from the bottom of Lake Titicaca in the Andes, a group of scientists was able to reconstruct the history of precipitation in tropical South America over the past 25,000 years.

A.

B. the types of fossilized algae that are present in core samples taken from the bottom of Lake Titicaca in the Andes, it was possible for a group of scientists

C. the types of fossilized algae that had been present in core samples taken from the bottom of Lake Titicaca in the Andes, that made it possible for a group of scientists

D. what types of fossilized algae had been present in core samples taken from the bottom of Lake Titicaca in the Andes, it was possible for a group of scientists

E. what the types of fossilized algae were present in core samples taken from the bottom of Lake Titicaca in the Andes, a group of scientists was able
[Reveal] Spoiler: OA
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Re: After determining the levels of calcium carbonate and the [#permalink]

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10 Jun 2007, 04:00
LM wrote:
After determining the levels of calcium carbonate and the types of fossilized algae present in core samples taken from the bottom of Lake Titicaca in the Andes, a group of scientists was able to reconstruct the history of precipitation in tropical South America over the past 25,000 years.

A.

B. the types of fossilized algae that are present in core samples taken from the bottom of Lake Titicaca in the Andes, it was possible for a group of scientists

C. the types of fossilized algae that had been present in core samples taken from the bottom of Lake Titicaca in the Andes, that made it possible for a group of scientists

D. what types of fossilized algae had been present in core samples taken from the bottom of Lake Titicaca in the Andes, it was possible for a group of scientists

E. what the types of fossilized algae were present in core samples taken from the bottom of Lake Titicaca in the Andes, a group of scientists was able

(A) and (E) correctly introduce the subordinate clause, which refers to 'a group of scientists'. 'what the types ... were present' is awkward. (A) is the best answer! cheers
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Re: After determining the levels of calcium carbonate and the [#permalink]

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11 Jun 2007, 10:34
eliminate D& E based on 'what types'

'C' is awkwardly constructed, 'algae that are present' throws off B...

...left with A.
Director
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Re: After determining the levels of calcium carbonate and the [#permalink]

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12 Jun 2007, 21:44
OA is "A"
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Re: After determining the levels of calcium carbonate and the [#permalink]

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07 May 2015, 08:34
(A) and (E) correctly introduce the subordinate clause, which refers to 'a group of scientists'.

E has issues with parallelism -

the levels of calcium carbonate and what the types of fossilized algae

A resolves those issues -

the levels of calcium carbonate and the types of fossilized algae
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Re: After determining the levels of calcium carbonate and the [#permalink]

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30 Jun 2016, 22:10
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: After determining the levels of calcium carbonate and the   [#permalink] 30 Jun 2016, 22:10
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