Your network contains an Active Directory domain named contoso.com. The domain contains a server named Server1 that runs Windows Server 2012 R2.
Server1 has the following role services installed:
• DirectAccess and VPN (RRAS)
• Network Policy Server
Remote users have client computers that run either Windows XP, Windows 7, or Windows 8.
You need to ensure that only the client computers that run Windows 7 or Windows 8 can establish VPN connections to Server1.
What should you configure on Server1?
A. A condition of a Network Policy Server (NPS) network policy
B. A constraint of a Network Policy Server (NPS) network policy
C. a condition of a Network Policy Server (NPS) connection request policy
D. A vendor-specific RADIUS attribute of a Network Policy Server (NPS) connection request policy
