You are the administrator of your company's network. A user named David runs Windows 2000 Professional on his portable computer. David wants to be able to work at home on files that he created at the office and stored on the company network. Prior to logging off the network and leaving the office, David enables offline files.   David calls you from home and reports that copies of his folders and files on the network are not available on his portable computer. What should you instruct David to do, so that he can proceed with his work?（）

• A、Enable file and print sharing. David will be able to access his files at home immediately. 
• B、Synchronize all offline files. David will be able to access his files at home immediately. 
• C、At the office, make all files available offline. David will be able to access his files the next time he logs off the network. 
• D、At the office, create a shortcut to the Offline Files folder. David will be able to access his files the next time he logs off the network.