这两道逻辑题百百思不得其解....

在做题的过程当中,我真是对自己的逻辑思维有些担心,看了答案也不明白
为什么,这是其中的两题:

1.Censue data for Prenland show that unmarried Prenlandic men in their thirities outnumber unmarried Prenlandic women in that age group by about ten to one. Most of these men do wish to marry.Clearly,however,unless many of them marry women who are not Prenlandic,all but a minority will remain unmarried.
The argument makes which of the following assumptions?
A. Emigration from Prenland is more common among women than amony men.
B.A greater proportion of Prenlandic women in their thirties than of Prenlandic men of the same age would prefer to remain un married.
C.It is unlikely that many of these unmarried Prenlandic men will marry women more than a few years older than themselves.
D.Prenland has a high rate of divorce.
E. Most of the unmarried Prenlandic men are unwilling to marry women who are not Prenlandic.

我的答案是E,但是正确答案是C,这到底是为什么呢?