题目内容：
根据材料回答2~3题：
To keep certain information private and secure while providing remote access for employees，many businesses are creating intranets．An intranet is an（ ）organizational intemet that is guarded against outside access by a special feature called a firewall(which can be software，hardware， or a combination of the two)．
A．outside
B．external
C．internal
D．inside
参考答案：