Your company’s network includes a main office and several branch offices.  The branch offices are connected to the main office by high-latency links.   All client computers run Windows 7 Enterprise， and all servers run Windows Server 2008 R2.  No servers are located in the branch offices.  Client computers in the branch offices frequently access a specific group of files on a file server named Server1.   These access requests consume significant amounts of bandwidth and reduce the speed of higher-priority traffic.   You need to reduce the bandwidth that is consumed by requests for frequently accessed files.   What should you do？（）

• A、Configure BranchCache in Hosted Cache mode on client computers in the main office and the branch offices.
• B、Configure BranchCache in Distributed Cache mode on client computers in the main office and the branch offices.
• C、Enable the BranchCache For Network Files role service on Server1. Configure BranchCache in Hosted Cache modon client computers in only the branch offices.
• D、Enable the BranchCache For Network Files role service on Server1. Configure BranchCache in Distributed Cache mode on client computers in only the branch offices.