逻辑大全三道题，跪求解释

纯斓梦

9.    Which of the following best completes the passage below?
Sales campaigns aimed at the faltering personal computer market have strongly emphasized ease of use, called user-friendliness. This emphasis is oddly premature and irrelevant in the eyes of most potential buyers, who are trying to address the logically prior issue of whether______
(A) user-friendliness also implies that owners can service their own computers
(B) personal computers cost more the more user-friendly they are
(C) currently available models are user-friendly enough to suit them
(D) the people promoting personal computers use them in their own homes
(E) they have enough sensible uses for a personal computer to justify the expense of buying one
答案为E


10.    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.
答案为A


11.    The following proposal to amend the bylaws of an organization was circulated to its members for comment.
When more than one nominee is to be named for an office, prospective nominees must consent to nomination and before giving such consent must be told who the other nominees will be.
Which of the following comments concerning the logic of the proposal is accurate if it cannot be known who the actual nominees are until prospective nominees have given their consent to be nominated?
(A) The proposal would make it possible for each of several nominees for an office to be aware of who all of the other nominees are.
(B) The proposal would widen the choice available to those choosing among the nominees.
(C) If there are several prospective nominees, the proposal would deny the last nominee equal treatment with the first.
(D) The proposal would enable a prospective nominee to withdraw from competition with a specific person without making that withdrawal known.
(E) If there is more than one prospective nominee, the proposal would make it impossible for anyone to become a nominee.

答案为E

真的搞不明白，求指教啊

心契

第九个哦~~句意是，销售活动旨在对于那些在“犹豫市场”的顾客，重点强调产品好用，这叫做用户使用方便。这个活动对于一些潜在客户是挺奇特也没什么相干的，因为他们着眼于提前逻辑问题“他们是否已经有足够多明显的用处去说明物有所值”。
我觉得就是说，很多潜在客户想要了解的是功能是不是enough而不是是不是ease of use，care的东西不一样~所以说这个销售活动不相干

纯斓梦

那为什么不选C呢