问题：

[单选]

Your network consists of a single Active Directory domain. The network is located on the 172.16.0.0/23  subnet.  
The company hires temporary employees. You provide user accounts and computers to the temporaryem ployees. The temporary employees receive computers that are outside the Active Directory domain.  
The temporary employees use their computers to connect to the network by using wired connections andwireless connections.
The company’s security policy specifies that the computers connected to the network must have the latest updates for the operating system.  
You need to plan the network’s security so that it complies with the company 's security policy.
What should you include in your plan？（）

A . Implement a Network Access Protection （NAP） strategy for the 172.16.0.0/23 subnet.
B . Create an extranet domain within the same forest. Migrate the temporary employees user accounts to the extranet domain. Install the necessary domain resources on the 172.16.0.0/23 subnet.
C . Move the temporary employees user accounts to a new organizational unit （OU）. Create a new Group Policy object （GPO） that uses an intranet Microsoft Update server. Link the new GPO tothe new OU.
D . Create a new subnet in a perimeter network. Relocate the wireless access point to the perimeter network. Require authentication through a VPN server before allowing access to the internal resources.