You have a portable computer named Computer1 that runs Windows 7. You have a file server namedServer1 that runs Windows Server 2008. Server1 contains a shared folder named Share1.  You need toconfigure Computer1 to meet the following requirements: Ensure that cached files from Share1 are encrypted.  Ensure that files located in Share1 are available when Server1 is disconnected from the network. What should you do?（）

• A、On Server1， encrypt the files in Share1. On Computer1， make Share1 available offline.
• B、On Server1， configure BitLocker Drive Encryption. On Computer1， make Share1 available offline.
• C、On Computer1， make Share1 available offline and enable encryption of offline files.
• D、On Computer1， copy the files from Share1 to the Documents library and configure BitLocker DriveEncryption.