Black Americans are, on the whole, about twice as likely as : GMAT Critical Reasoning (CR)
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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]

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09 Jun 2008, 03:14
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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
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Re: CR: Salt - History [#permalink]

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09 Jun 2008, 05:19
A for me.
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Re: CR: Salt - History [#permalink]

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09 Jun 2008, 05:38
This was discussed in a lot of detail here :
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Re: CR: Salt - History [#permalink]

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09 Jun 2008, 05:52
prasannar 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

Researcher's hypothesis:
Westernized black Africans' genes adapted to environmental scarcity of salt in west and they starting having high salt diets.

I find C to be supporting this hypthesis,

Whites (originally westerners, having high salt diets) started living in Africa (environmentally higher salt) , they too started having high blood pressures, because of which they switched to lower salt consumption.

in A, B , d & E i did not find transition by people from one part to other.

I may be completely wrong in my reasoning though
Re: CR: Salt - History   [#permalink] 09 Jun 2008, 05:52
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