What should you deploy?

A company has Active Directory Domain Services (AD DS) domain controllers that run on Windows
Server 2012 R2 servers. There are two forests, and each has a single domain. There is a two-way
forest trust between the forests. The company uses Hyper-V for server visualization. The Hyper-V
environment contains the Hyper-V host servers as shown in the following table:

You prepare to deploy System Center 2012 R2 Data Protection Manager (DPM) to back up the
Hyper-V environment. The deployment must meet the following requirements:
ensure that all Hyper-V servers can be backed up by using DPM
Hyper-v hosts in the perimeter network must use certificate-based authentication
Hyper-V hosts in the internal network must use Kerberos authentication
minimize the total number of DPM servers
You need to deploy DPM to the environment.
What should you deploy?

A.
four DPM servers in the internal network and two DPM servers in the perimeter network

B.
two DPM servers in the internal network only

C.
two DPM servers in the internal network and two DPM servers in the perimeter network

D.
two DPM servers in the internal network and one DPM server in the per meter network