You have a server that runs Windows Server 2008. The server has the Windows Server virtualization role service installed. You create a new virtual machine and perform an installation of Windows Server 2008 on the virtual machine. You configure the virtual machine to use the physical network card of the host server. You notice that you are unable to access network resources from the virtual machine. You need to ensure that the virtual host can connect to the physical network. What should you do？（）

A. On the host server， install the MS Loopback adapter.
B. On the host server， enable the Multipath I/O feature.
C. On the virtual machine， install the MS Loopback adapter.
D. On the virtual machine， install Windows Server virtualization Guest Integration Components.