You are configuring a Windows Server？2008？R2 Hyper-V failover cluster. You configure five iSCSI logical unit numbers （LUNs） on shared storage， and you present them to the first server. Each LUN appears twice in the Disk Management console.  You need to ensure that each LUN appears only once in the Disk Management console. What should you do？（）

• A、Reset the iSCSI initiator name to the default name.
• B、Install and configure Microsoft Multipath I/O （MPIO）.
• C、In the Disk Management console， rescan the disks.
• D、In the Disk Management console， configure shadow copies.