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Weaken the conclusion

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Weaken the conclusion  [#permalink]

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New post 02 Jul 2018, 10:06
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  65% (hard)

Question Stats:

33% (01:30) correct 67% (02:21) wrong based on 12 sessions

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Although fullerenes -spherical molecules made entirely of carbon were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerness requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the earth's crust at the time these naturally occurring fullerenes were formed.

Which of the following if true most seriously undermines the argument ?
A. Confirming that the shungite genuinely contained fullerenes took careful experimentation.
B. Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
C. The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
D. The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
E. Shungite itself is formed only under distinctive conditions.
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Re: Weaken the conclusion  [#permalink]

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New post 02 Jul 2018, 11:02
Please explain the OA
D. The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
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Re: Weaken the conclusion  [#permalink]

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New post 02 Jul 2018, 11:09
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MSGmat1 wrote:
Although fullerenes -spherical molecules made entirely of carbon were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerness requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the earth's crust at the time these naturally occurring fullerenes were formed.

Which of the following if true most seriously undermines the argument ?
A. Confirming that the shungite genuinely contained fullerenes took careful experimentation.
B. Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
C. The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
D. The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
E. Shungite itself is formed only under distinctive conditions.


Discussed here: https://gmatclub.com/forum/although-ful ... 78298.html Hope it helps.
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Re: Weaken the conclusion &nbs [#permalink] 02 Jul 2018, 11:09
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