Your company has a main office and a branch office. In the main office, you have a server named Server1 that runs Windows Server Update Services (WSUS) 3.0. Server1 is the only WSUS server in the company. You plan to deploy WSUS 3.0 on a server named Server2 in the branch office. You need to configure WSUS on Server2 to meet the following requirements: ·Receive update approvals from Server1. ·Prevent the modification of update approvals on Server2. ·Allow administrators to monitor updates, monitor computer status, and configure a synchronization schedule on Server2. How should you configure Server2? （）

• A、to use a proxy server
• B、as a replica of Server1
• C、as a stand-alone WSUS 3.0 server
• D、as an autonomous downstream server