求解一题,讨论CR题 选项的相关性问题！感谢！

adriana2011

看到有人发了这个题目求解，好像还没有得到回答。我特贴到此，希望能够和各位做个探讨：                                                                                       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.

前提：Black Americans 比White Americans更容易(twice likely)高血压　
结论：认为这种情况是因为　高盐饮食（western high-salt diets）以及他们的基因无法适应低盐环境　所致


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. 原文的推理是讲关于  高盐饮食，低盐分适应性基因和高血压之间的关系，至于高盐意识是不是个影响健康的问题，和原文推理无关。
(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.原文的推理是讲关于  高盐饮食，低盐分适应性基因和高血压之间的关系。 因为血压高了，导致他们降低饮食盐含量，。这里说的是血压升高后的情况。  无关！
(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.这里说的是这些人一直都住在什么地方（远离有“盐”的地方），不能自己做推理的链接就认为远离那地方 获取盐就少。至少DA比较，我觉得杀D留A
(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.

我的问题是： 剩下了AE，继续比！
如果说答案是A，的确有相关性。但是我的问题是：E为啥不对呢？ e选项排出了盐分代谢导致血压高低的差异的问题？

麻烦谁帮我讲讲，看看我的思路是否有问题，问题在那里？

万分感谢！

adriana2011

自己顶一下！
貌似我想明白了： E 选项说的是 salt metabolism ，但是原文并没有给出任何关于 salt metabolism 和血压高低之间的相关信息，所以我自己不能根据自己所谓的常识去做逻辑链的添加。因此选项A