题目如下
大全-3-19. 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. 这道极具迷惑性的题目，在很多bbs都有讨论过，请贵bbs各位G友帮助我向我们学校的评卷老师证明这道题的答案是A，而不是D。
