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# The ancient Nubians inhabited an area in which typhus occurred, yet su

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Re: The ancient Nubians inhabited an area in which typhus occurred, yet su  [#permalink]

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05 Nov 2019, 13:17
Skywalker18 wrote:
I was down to options A and D and chose option A.

A on negation, The tetracycline deposits did form after the bodies were buried.
D on negation, Tetracycline is rendered ineffective as an antibiotic by exposure to the process involved in making bread and beer.
Both options seem like assumptions to me.

They could both be assumptions, but, of the two, only (D) is necessary for arriving at the conclusion. If (A) is not true, the argument still has some decent support for the conclusion that the ancient Nubians consumed tetracycline when they consumed food. If (D) is not true, then the conclusion is virtually unsupported.

It's a funny question though, I have to admit, because the part about the bone deposits is part of the support for the conclusion, and that support does not work without (A).
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The ancient Nubians inhabited an area in which typhus occurred, yet su  [#permalink]

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25 Nov 2019, 16:35

Can we somehow confirm that this is an official GMATPrep question? Usually, Assumption questions (1) have a big gap or (2) can be challenged. In the first case, a correct answer choice (assumption) closes the gap. In the second case, an assumption "kills" the challenge so that the argument can stand.

IMO, option (A) looks like a good challenger to the conclusion, which says that antibiotic probably explains the low incidence of disease in skeletons. If we negate (A) we literally say that antibiotic (that is generated from bacteria that sits in the soil) killed / cured the disease after the bodies were buried.

I agree that (D) is a bit stronger challenger than (A), but both are good. This is why I doubt that this is an official question.
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Re: The ancient Nubians inhabited an area in which typhus occurred, yet su  [#permalink]

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26 Nov 2019, 06:28
mykrasovski wrote:

Can we somehow confirm that this is an official GMATPrep question? Usually, Assumption questions (1) have a big gap or (2) can be challenged. In the first case, a correct answer choice (assumption) closes the gap. In the second case, an assumption "kills" the challenge so that the argument can stand.

IMO, option (A) looks like a good challenger to the conclusion, which says that antibiotic probably explains the low incidence of disease in skeletons. If we negate (A) we literally say that antibiotic (that is generated from bacteria that sits in the soil) killed / cured the disease after the bodies were buried.

I agree that (D) is a bit stronger challenger than (A), but both are good. This is why I doubt that this is an official question.

Question looks legitimate to me. See my explanation above and let me know if that clears anything up.
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Re: The ancient Nubians inhabited an area in which typhus occurred, yet su  [#permalink]

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26 Nov 2019, 09:03

I guess the reason why (A) is incorrect is because it attacks the premise. And you discussed what consequences this attack has. Option (D), however, directly addresses the conclusion. Without (D), the argument falls apart big time. Things are clear now. Thanks!
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Re: The ancient Nubians inhabited an area in which typhus occurred, yet su  [#permalink]

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26 Nov 2019, 09:51
The ancient Nubians inhabited an area in which typhus occurred, yet surprisingly few of their skeletons show the usual evidence of this disease. The skeletons do show deposits of tetracycline, an antibiotic produced by a bacterium common in Nubian soil. This bacterium can flourish on the dried grain used for making two staples of the Nubian diet, beer and bread. Thus, tetracycline in their food probably explains the low incidence of typhus among ancient Nubians.

Which of the following is an assumption on which the argument relies?

(A) The tetracycline deposits did not form after the bodies were buried.

(B) The diseases other than typhus to which the ancient Nubians were exposed would not be affected by tetracycline.

(C) Typhus is generally fatal.

(D) Tetracycline is not rendered ineffective as an antibiotic by exposure to the process involved in making bread and beer.

(E) Bread and beer were the only foods eaten by the ancient Nubians which could have contained tetracycline.

d is correct
Re: The ancient Nubians inhabited an area in which typhus occurred, yet su   [#permalink] 26 Nov 2019, 09:51

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