You have a server that runs Windows Server 2008.You need to configure the server as a VPN server. What should you install on the server？ （）

• A、Windows Deployment Services server role and Deployment Server role service.
• B、Windows Deployment Services server role and Transport role Service.
• C、Network Policy and Access Services server role and Routing and Remote Access Services role service.
• D、Network Policy and Access Services server role and Host Credential Authorization Protocol role.