— How can I get well along with others, father?

— Try to smile to others, boy. That will make _____ much _____. [ ]

A. them, easier

B. them, more easy

C. it, easy

D. it, easier

以下不属于企业内部应用计算机信息系统的是（）。

A.计算机辅助设计

B.计算机辅助制造

C.电子商务

D.知识管理