A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employees to 2 different offices?
A. 5
B. 6
C. 7
D. 8
E. 9
ANS：D
我都算不出來8種，不是『0，3』『1，2』『2，1』『3，0』這四種嗎？
我不知道自己哪裡搞錯了！
