Your network contains two Hyper-V hosts that run Windows Server 2012 R2. The Hyper-V hosts contains 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、Port mirroring
• B、DHCP guard
• C、Router guard
• D、MAC address