OG上的逻辑题请教

melody远行

Codex Berinensis, a Florentine copy of an ancient Roman medical treatise, is undated but contains clues to when
it was produced. Its first 80 pages are by a single copyist, but the remaining 20 pages are by three different
copyists, which indicates some significant disruption. Since a letter in handwriting identified as that of the fourth
copyist mentions a plague that killed many people in Florence in 1148, Codex Berinensis was probably produced
in that year.
Which of the following, if true, most strongly supports the hypothesis that Codex Berinensis was produced
in 1148?
(A) Other than Codex Berinensis, there are no known samples of the handwriting of the first three copyists.
(B) According to the account by the fourth copyist, the plague went on for 10 months.
(C) A scribe would be able to copy a page of text the size and style of Codex Berinensis in a day.
(D) There was only one outbreak of plague in Florence in the 1100s.
(E) The number of pages of Codex Berinensis produced by a single scribe becomes smaller with each
successive change of copyist.
答案给的是D，看了解释还是摸不着头脑。有同学能给指点一下吗？感谢！

naoyixue

CB，一份佛伦洛萨的复件关于古罗马医学方面的著作，没有表明啥时候完成的但是包含了一线线索。 这本复件的前80页是由一个人来抄写完成的，但是余下的20页是被3个不同抄写的人来完成的，这个事情表明了一些重大的波折。（在3个人完成最后20页的过程中）。由于在第4个，也就是最后一个人他曾经提及在1148年的佛罗伦萨有一个疫病杀死了很多人，所以CB很有可能在那年被完成。

问： 下面哪一个加强CB是1148年抄写完的
1：除了CB,不存在知道的手写的样本来自前3个抄写的人 （ 就是CB是唯一存在且知道前3个抄写人员的的手写的样本）
2：按照第4个抄写人额说法，这个疫病持续了10个月
3：一个抄写员可以再一天内完成CB的抄写
4：仅仅有一场大病在1100--1199年中，只有爆发了一场大病（那么直接加强文中的since后面的原因1148年的大病杀死很多人，包括前3个抄写员），这里要求你加强文中的假设，其实就是加强文中给出的论据-----1148年有病疫，杀死很多人即可
5，单单一个人抄写的页数的数字会更小随着后来者去改变

naoyixue

说错了，其实只要加强文中给出的原因，不是杰伦， 即原因的唯一性，排除他因，倘若在1100到1199这段时间发生2次疫病，那么就不能确定是哪一次疫病（因为文中说了， 疫病杀死很多人，其实暗示了前面3个都死于疫病）