Prep Text#1 12 请指教

Finding of a survey of Systems magazine subscribers: Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.

Finding of a survey of advertisers in Systems magazine: Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.

For both of the finding to be accurate, which of the following must be true?

答案是：E:  Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.

请帮帮我解释一下题目，并告诉我为什么选E啊？？

谢谢……

你好，我想问一下，ＰＲＥＰ这个软件一共两套试题，是不是每次做都会出现不同的题目，我只做了一次，还没有开始学习，所以不太了解．Prep Text#1 12 ，这些代码我作时好象没看到．

解释一下你的题目，对于系统报纸征购者的调查：３０％的在去年因为广告而订购货物的人年龄是３５岁以下．

对于系统报纸广告商的调查：大部分的在去年因为广告而订购货物的人年龄是３５岁以下．

它好像有个题库，题目不是很多语文所有部分加起来大概五六百道题吧。现在都是把它的题库给提取出来了，分项复习做了啊……

我就是这样复习的，你的英语实力真让我佩服，刚复习就这么厉害，我以后还要多向你请教啊……

wenqi666(A) hotmail.com 这是我的邮箱，希望加我，以后复习能共同讨论啊……

我的qq:283031056

好的,以后一起复习