在教育活动中，学生不是被动的加工对象，而是具有主体性的人。主体性就是学生在教学中的主观能动性，其内涵不包含______。

A．illustrate how economy systems operate
B．compare barter system with money-exchange system
C．argue about the disadvantage of traditional economic system
D．outline the three basic types of economic systems

A．the government
B．state-owned enterprises
C．private sectors
D．foreign enterprises