You need to install updates on the Hyper-V host servers

An organization has private and public cloud resources. The organization has Windows Server 2012
R2 servers that have the Hyper-V roll installed. You have one four-node cluster of Hyper-V host
servers. You use System Center 2012 R2.
The virtual machines that run on the cluster must remain online when you install updates on the
Hyper-V host servers.
You need to install updates on the Hyper-V host servers.
What should you do?

A.
Configure Windows Server Update Services (WSUS) to provide updates to the virtual machines
hosted on the cluster.

B.
Add all the servers to a collection in System Center 2012 R2 Configuration Manager. Deploy
updates to the collection.

C.
Create orchestrated updates of Hyper-V host clusters by using System Center 2012 R2 Virtual
Machine Manager (VMM).

D.
Configure Windows Update on the Hyper-V host servers to download updates from Microsoft
Update.

Explanation: