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.