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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 15 Jul 2005, 21:38
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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 Afrians when compared to White Afrians. 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 persent day, westernized Black Africans, if true, would most tend to confirm the researchers' hypothesis?

a. The blood pressure of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.

b. The unusally 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 peooples who have had salt available throughout their history and those who have not.
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 [#permalink] New post 16 Jul 2005, 02:17
Picked A.

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 [#permalink] New post 19 Jul 2005, 08:11
Should be A.

Only choice A establishes the connection between environmental scarcity of salt and Africans. Therefore if some africans were exposed to an environment where salt was abundant, then their blood pressures will be low. Thus A supports the researcher's conclusion
  [#permalink] 19 Jul 2005, 08:11
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