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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
55% (01:44) correct
45%
(02:08)
wrong
based on 316
sessions
History
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Time
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Not Attempted Yet
Teeth-Whitening Kits available for retail purchase are demonstrably effective at reducing plague buildup and returning teeth to their natural shade, but only for periods of about two or three months. They require additional purchases and application. Professional cleaning by dental hygienists, however, can be effective at reducing plaque builtup and improving tooth appearance for six months to a year. Thus, for people looking to improve the appearance of their teeth in the long term, retail teeth-whitening kits should play no part in maintaining dental hygiene.
The argument is most vulnerable to the objection that it fails to:
A) consider that some people may only be interested in temporarily whitening their teeth.
B) Search for any alternative methods that may contribute to teeth whitening.
C) distinguish between effective and ineffective dental hygienists.
D) consider a combination of the two teeth whitening methods it describes.
E) suggest that toothpaste and floss might be as effective as any of the two methods mentioned.
Source: Ready4GMAT
The argument is most vulnerable to the objection that it fails to:
A) consider that some people may only be interested in temporarily whitening their teeth.
B) Search for any alternative methods that may contribute to teeth whitening.
C) distinguish between effective and ineffective dental hygienists.
D) consider a combination of the two teeth whitening methods it describes.
E) suggest that toothpaste and floss might be as effective as any of the two methods mentioned.
Source: Ready4GMAT
Show SpoilerOfficial Explanation
After we've read the paragraph and question, we might want to rephrase the question: which is the best critique of the argument that "retail teeth-whitening kits should play no part" in people's whitening plans?
Choice (A) is irrelevant because the conclusion specifically states that it applies to "the long term".
Choice (B) is irrelevant because "alternative methods" wouldn't have any impact on the conclusion about retail whitening kits in particular. Choice (C) and (E) have the same problem.
We might have noticed when reading the argument that "play no part" sounds extreme, and choice (D) points us to that part of the conclusion: people who have their teeth professionally whitened might also use retail whitening kits for any number of reasons.
The correct answer is (D)
Choice (A) is irrelevant because the conclusion specifically states that it applies to "the long term".
Choice (B) is irrelevant because "alternative methods" wouldn't have any impact on the conclusion about retail whitening kits in particular. Choice (C) and (E) have the same problem.
We might have noticed when reading the argument that "play no part" sounds extreme, and choice (D) points us to that part of the conclusion: people who have their teeth professionally whitened might also use retail whitening kits for any number of reasons.
The correct answer is (D)
27 Jul 2019, 11:12
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Hi generis,
Could you please explain me the why the correct answer is option D rather than option A.
I marked A... as it might be possibility that few people wants teeth whitening only for small time, for them the other method wont be good.
Could you please explain me the why the correct answer is option D rather than option A.
I marked A... as it might be possibility that few people wants teeth whitening only for small time, for them the other method wont be good.
27 Jul 2019, 11:45
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vishumangal
Hi generis,
Could you please explain me the why the correct answer is option D rather than option A.
I marked A... as it might be possibility that few people wants teeth whitening only for small time, for them the other method wont be good.
Could you please explain me the why the correct answer is option D rather than option A.
I marked A... as it might be possibility that few people wants teeth whitening only for small time, for them the other method wont be good.
Teeth-Whitening Kits available for retail purchase are demonstrably effective at reducing plague buildup and returning teeth to their natural shade, but only for periods of about two or three months. They require additional purchases and application. Professional cleaning by dental hygienists, however, can be effective at reducing plaque built up and improving tooth appearance for six months to a year. Thus, for people looking to improve the appearance of their teeth in the long term, retail teeth-whitening kits should play no part in maintaining dental hygiene.
The argument is most vulnerable to the objection that it fails to:
A) consider that some people may only be interested in temporarily whitening their teeth.-- The reason A is not correct because the passage Explicitly states in its last sentence that "for people looking to improve the appearance of their teeth in the LONG TERM", so basically the passage isn't concerned about the people who are interested in temporarily whitening their teeth.
B) Search for any alternative methods that may contribute to teeth whitening. -- Out of scope. The comparison is only between the 2 above mentioned methods.
C) distinguish between effective and ineffective dental hygienists. -- Again, out of scope. It is the effectiveness of a professional cleaning which is the deciding factor not the effectiveness of a dental hygienist.
D) consider a combination of the two teeth whitening methods it describes. --
CORRECT
E) suggest that toothpaste and floss might be as effective as any of the two methods mentioned.-- Clearly, Out of scope
