You are configuring a virtual machine （VM） that is running on a Windows Server 2008 R2 host server. The primary virtual disk is connected to IDE Controller 0. You need to add a virtual disk to the VM without shutting down the VM. What should you do？（）

Add the virtual disk to IDE Controller 0.
B. Add the virtual disk to IDE Controller 1.
C. Add the virtual disk to an existing SCSI controller.
D. Add a virtual network adapter to the VAttach an iSCSI disk to the VM through the virtual network adapter.