单选题 A thorough search of Edgar Allan Poe's correspondence has turned up not a single letter in which be mentions his reputed morphine addiction. On the basis of this evidence it is safe to say that Poe's reputation for having been a morphine addict is undeserved and that reports of his supposed addiction are untrue.
Which of the following is assumed by the argument above?

A、 Reports claiming that Poe was addicted to morphine did not begin to circulate until after his death.
B、 None of the reports of Poe's supposed morphine addiction can be traced to individuals who actually knew Poe.
C、 Poe's income from writing would not have been sufficient to support a morphine addiction.
D、 Poe would have been unable to carry on an extensive correspondence while under the influence of morphine.
E、 (E) Fear of the consequences would not have prevented Poe from indicating in his correspondence that he was addicted to morphine.

【正确答案】 E

【答案解析】[解析] 本题推理是由一个事实“Poe的信件中未提到吗啡瘾”，而得出一个解释性的结论“Poe没有吗啡瘾”，属于典型的“B、A”模式，其隐含的假设是：“除了A之外无别的因素影响B”。我们可以用否定概念来定位选项，不过本题5个选项均有否定词，所以应该用A或B中的关键词来定位。当我们用B的关键词“correspondence”来定位选项时，发现(D)、(E)也有这个词。如果由于担心后果而使Poe没有在信中提到他的吗啡瘾，如(E)所说，那么就排除了其他可能，所以(E)是一个假设。(D)对上述推理起到了支持作用。