You have a virtual machine named VM1 that runs on a host named Host1.

You configure VM1 to replicate to another host named Host2. Host2 is located in the same physical
location as Host1.
You need to add an additional replica of VM1. The replica will be located in a different physical site.
What should you do?

A.
From VM1 on Host2, click Extend Replication.

B.
On Host1, configure the Hyper-V settings.

C.
From VM1 on Host1, click Extend Replication.

D.
On Host2, configure the Hyper-V settings.

Explanation:
Extend Replication through UI:
Before you Extend Replication to third site, you need to establish the replication between a primary
server and replica server.
Once that is done, go to replica site and from Hyper-V UI manager select the VM for which you want
to extend the replication. Right click on VM and select “Replication->Extend Replication …”. This will
open Extend Replication Wizard which is similar to Enable Replication Wizard.
NOTE: You configure a server to receive replication with Hyper-V Manager, in this situation the
replica site is assumed to be the Replica Server. Therefore you extend replication from VM1 on
Host2.
Note 2: With Hyper-V Extend Replication feature in Windows Server 2012 R2, customers can have
multiple copies of data to protect them from different outage scenarios. For example, as a customer
I might choose to keep my second DR site in the same campus or a few miles away while I want to
keep my third copy of data across the continents to give added protection for my workloads. HyperV Replica Extend replication exactly addresses this problem by providing one more copy of workload
at an extended site apart from replica site.

Hyper-V Replica: Extend Replication
http://blogs.technet.com/b/virtualization/archive/2013/12/10/hyper-v-replica-extendreplication.aspx