You have a computer named Computer1 that runs Windows 7. You need to ensure that Computer1 canconnect to File Transfer Protocol (FTP) servers only while it is connected to a private network. What should you do?（）
- AFrom Windows Firewall with Advanced Security， create a new rule.
- BFrom the local Group Policy， modify the application control policies.
- CFrom Windows Firewall， modify the Allowed Programs and Features list.
- DFrom Network and Sharing Center， modify the Advanced Sharing settings.