Your network has a main office and a branch office. The branch office has five client computers that runWindows 7 and a server that runs Windows Server 2008 R2. The branch office server is enabled for branchCache. You need to configure Windows Firewall on each client computer so that cached content canbe retrieved from the branch office server.  Which firewall rule should you enable on the client computers?（）

• A、BranchCache - Content Retrieval （Uses HTTP）
• B、BranchCache - Hosted Cache Server （Uses HTTPS）
• C、BranchCache - Peer Discovery （Uses WSD）
• D、File and Printer Sharing