這兩道邏輯題百百思不得其解....

在做題的過程當中,我真是對自己的邏輯思維有些擔心,看了答案也不明白
為什麽,這是其中的兩題:

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,但是正確答案是C,這到底是為什麽呢?