请教一道费费数学

A box which is 20 inches long, 8 iches wide and 2 inches high is to be completely wrapped with paper. If a single sheet of paper is to used without patching, then the dimensions of the paper could be

A. 17*25

B. 21*24

C. 24*12

D. 24*14

E. 26*14

这道题见过几次了，但是连钱永强和费费也没有讲的很明白咯，谁能解释一下。（但是不要告诉我把各个选项乘起来去比较面积大小）

Please include the section and question number in the subject.

Have you looked here?

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=176560&page=1

FYI:

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=176560&page=1

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=128922&page=1