You work as the network administrator at ESL, Ltd. The company’s network consists of two server named Server1 and Server2. Both Servers run Windows Serer 2008, and have installed the Hyper-V server role on the Server1 and Windows Deployment Services role on server2. Currently, you create a new virtual machine and connect the network adapter to an external virtual network. You attempt to start the virtual machine but receive the following error message: Boot failure. Reboot and select proper Boot device or Insert Boot Media in selected Boot device. You must find a solution to ensure that the virtual machine can start by using Pre-boot Execution Environment (PXE). Then what action should you perform to achieve the goal?

A.
You need to connect a virtual PXE disk and start the virtual machine.

B.
You need to add a legacy network adapter to the virtual machine and restart the virtual machine.

C.
You need to bind the Microsoft Virtual Network Switch Protocol to the external network adapter on Server1.

D.
You need to connect the network adapter to a virtual network that has a private connection type and restart the virtual machine.