You have a private cloud infrastructure that uses System Center 2012 R2 Virtual Machine Manager (VMM).
You plan to host several hundred private clouds for different customers by using the infrastructure.
You need to ensure that all of the customers can use any IP address range in their private cloud.
What is the best approach to achieve the goal? More than one answer choice may achieve the goal. Select the BEST answer.

A.
Create a virtual machine network that uses network virtualization.

B.
Install a VMM Network Virtualization for Generic Routing Encapsulation (NVGRE) gateway in each private cloud.

C.
Install the IP Address Management (IPAM) Server feature in each private cloud.

D.
Create a virtual machine network that uses VLAN network isolation.

Explanation:
Network Virtualization introduced in Windows Server 2012 Hyper-V provides administrators with the ability to create multiple virtual networks on a shared physical
network. In this approach to isolation, each tenant gets a complete virtual network, which includes support for virtual subnets and virtual routing. Tenants can even
use their own IP addresses and subnets in these virtual networks, even if these conflict with or overlap with those used by other tenants.
Ref: http://blogs.technet.com/b/scvmm/archive/2013/06/17/logical-networks-part-v-network- virtualization.aspx