You are a network administrator for your company. The company has a main office and one branch office. The network consists of a single Active Directory domain. All servers run Windows Server 2003.   The company needs to connect the main office network and the branch office network by using Routing and Remote Access servers at each office. The networks will be connected by a VPN connection over the Internet.   The company’s written security policy includes the following requirements for VPN connections over the Internet：  All data must be encrypted with end-to-end encryption.  VPN connection authentication must be at the computer level.   Credential information must not be transmitted over the Internet as part of the authentication process.   You need to configure security for VPN connection between the main office and the branch office. You need to comply with the written security policy.   What should you do？  （）

• A、 Use a PPTP connection with EAP-TLS authentication.
• B、 Use a PPTP connection with MS-CHAP v2 authentication.
• C、 Use an L2TP connection with EAP-TLS authentication.
• D、 Use an L2TP connection with MS-CHAP v2 authentication.