[求助]一道补充材料的题

In the course of her researches, a historian recently
   found two documents mentioning the same person,
   Erich Schnitzler. One, dated May 3, 1739, is a
   record of Schnitzler’s arrest for peddling without a
   license. The second, undated, is a statement by
   Schnitzler asserting that he has been peddling off
   and on for 20 years.

   The facts above best support which of the following
   conclusions?
   (A) Schnitzler started peddling around 1719.
   (B) Schnitzler was arrested repeatedly for peddling.
   (C) The undated document was written before 1765.
   (D) The arrest record was written after the undated
       document.
   (E) The arrest record provides better evidence that
       Schnitzler peddled than does the undated
       document.
答案是c.怎么也看不出来这道题根1765有什么关系啊？1739年的是S的非法经商的拘捕记录。第二个没有日期的证据是S自己说的自己已经非法经商20年了。只能说明S至少是从1719年以前开始经商的。

我看这题的时候扫了一下５个选项，然后开始研究这两个带的数字选项ａ和ｃ 很明显ｃ是答案，　前面给了连个条件　归纳题一般会用全 题中的条件：你两个条件看一下文中说　都记录了一件事　那么这件事一定法正在这两个记录之前　（要不写记录的人就没法写了） 1739+20= 1759 第二个记录一定在1759前。 c 当然是很好的支持。 1765 前。看清楚是上面支持下面。

支持题是不需要充分的， 只要能对题目构成支持就行。