各位大神帮忙看一下这道GRE逻辑单题哦，谢谢啦！！！

Question

On turning 65 years old, everyone living in the town of Malton becomes eligible to receive a card that guarantees discounts on most goods and services sold in the town. Census records for 1990 show that 2, 450 inhabitants of Malton turned 64 in that year. Yet . in 1991 over 3,000 people applied for and properly received discount cards. So clearly some of Malton's population growth between 1990 and 1992 must be attributable to migration into the city by people in their mid -60's

Which of the following is an assumption on which the argument depends?
(A) The town of Malton has no complete census records for 1991.
(B) The overall size of the population of Malton grew by over 500 during 1990.
(C) Fewer people applied for and received discount cards in 1991 than did so in 1992.
(D) Among the people 65 years old or older who moved into Malton in 1991. there was no one who did not apply for a discount card .
(E) In general. people who applied for and received discount cards in 1991 first became eligible to do so in that year

正确答案是D，希望各位大神能帮忙讲解一下思路。谢谢啦！

Answer 1

我个人觉得这道题的逻辑是这样子的：前提1：到91年M地有2450人到达65岁，符合申请要求。
前提2:91年一共有超过3000人申请。
可能的结果：1.多出来的人是移民来的。
2.多出来的人非移民来的；而是本地的65岁以上，非65岁的。
文中直接推出结果1，而忽略了结果2，显然不严谨。
答案是需要支持文中的推论，显然assumption就需要用来排除结果2的情况。
而E答案的意思是91年申请的人，都是刚开始有资格申请，言外之意，都是65岁，没有65岁以上的。刚好排除结果2.
D选项是说，在65岁或以上的移民中，全部都申请了discount card。支持不了吧。。。。。
就算没全部申请，一部分申请，也可以啊。
所以，我觉得答案应该是E才对。

Answer 2

这道题的premise是1990年时M地有2450人64岁了，而到了91年有超过3000人申请了65岁的福利卡，conclusion是90-92年有mid60‘s的人移居到M，而问题问的是assumption。就是说要使这个假设和结论成立的条件就是这些人移民的人在91年的时候没申请，92年的时候申请了。注意这道题有前提，有结论，所以选择的选项一定要是最贴近前提和结论内容关系的

Answer 3

楼上正解