Which virtual machine settings should you configure?

Your network contains two Hyper-V hosts that run Windows Server 2012 R2. The Hyper-V hosts
contain several virtual machines that run Windows Server 2012 R2.
You install the Network Load Balancing feature on the virtual machines.
You need to configure the virtual machines to support Network Load Balancing (NLB).
Which virtual machine settings should you configure?

A.
DHCP guard

B.
Port mirroring

C.
Router guard

D.
MAC address

Explanation:
http://social.technet.microsoft.com/Forums/windowsserver/en-US/5b3a0a9d-26a2-49ba-bbbe-
29d11fcbb7ce/nlb-on-hyperv?forum=winserverhyperv
For NLB to be configured you need to enable MAC address spoofing.