求问一道36套里的逻辑题

Merseyside

exe21.7
                                                                7. On turning 65 years old, everyone living in the town ofMalton becomes eligible to receive a card thatguarantees discounts on most goods and services soldin 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 properlyreceived discount cards. So clearly some of Malton'spopulation growth between 1990 and 1992 must beattributable to migration into the city by people intheir mid -60's
            
                            Which of the following is an assumption on which theargument depends?
                (A) The town of Malton has no complete censusrecords for 1991.
                (B) The overall size of the population of Malton grewby over 500 during 1990.
                (C) Fewer people applied for and received discountcards in 1991 than did so in 1992.
                (D) Among the people 65 years old or older whomoved into Malton in 1991. there was no onewho did not apply for a discount card .
                (E) In general. people who applied for and receiveddiscount cards in 1991 first became eligible to doso in that year
            
        
    
答案给的是D,我选的是E，不太明白..谢谢各位的解答..

lijiustc

重点关注so的前后句，这是推理的体现，前后句中分别把apply和migration联系起来，因此只需要弥补差异，给出中间过程即可，只有D是把这两者联系起来的···

dutianandy

这题是assumption题。答案必须正确的解释文中的现象！E不太合适，没有解释文中的现象是为什么。