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

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