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Black Americans are, on the whole, about twice as likely as

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Black Americans are, on the whole, about twice as likely as [#permalink] New post 25 Jun 2009, 23:36
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A
B
C
D
E

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Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans.
Researchers have hypothesized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.
Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?
(A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.
(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem.
(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.
(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far south of Saharan salt mines.
(E) No significant differences in salt metabolism have been found between those people who have had salt available throughout their history and those who have not.
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Re: Salt... [#permalink] New post 26 Jun 2009, 00:09
Is it a GMAT based question? I found it very different.

Anyway, IMO D...(only relevant option that correlates history/genes with the salt level as suggested in the hypothesis
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Re: Salt... [#permalink] New post 27 Jun 2009, 07:30
AGree..

it is the only option which talks about blood pressures and salt scarcity..
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Re: Salt... [#permalink] New post 27 Jun 2009, 07:46
I think it's A because this statement connects gene adaption to environmental scarcity of salt (the inverse, in this case) and blood pressure.

Does anyone know the OA?
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Re: Salt... [#permalink] New post 27 Jun 2009, 12:06
acer2knight wrote:
Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans.
Researchers have hypothesized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.
Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?
(A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.
(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem.
(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.
(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far south of Saharan salt mines.
(E) No significant differences in salt metabolism have been found between those people who have had salt available throughout their history and those who have not.


I think (D) looks most promising.

The argument basically says, "high salt diet + genetics causes high blood pressure".
(D) says "low salt diet + genetics causes low blood pressure".
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Re: Salt... [#permalink] New post 27 Jun 2009, 15:11
I'm with A. What's the OA?
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Re: Salt... [#permalink] New post 02 Aug 2009, 14:28
This is from 1000Cr and OA I have is A.
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Re: Salt... [#permalink] New post 02 Aug 2009, 14:34
D is not the answer because it is exactly opposite to what we are trying to prove.

Statement says High BP among Black American and cos of genes + low salt. We need a statement that strrnghtens this statements.

The people of Yoruba didnt have salt around them throughout history. But we dont know what would have happened to BP if they were exposed to salt.

A says that people in Gambia had low BP even though they had access to salt. So this proves that since most Black Americans from Africa did not have access to salt, their genes altered reaction to salt.
Re: Salt...   [#permalink] 02 Aug 2009, 14:34
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