You need to ensure that the additional disk space can be used to store DPM backups

Your company has a private cloud that is managed by using a System Center 2012 infrastructure.

The infrastructure contains multiple servers that have Data Protection Manager (DPM) installed. A DPM server named Server1 is running out of hard disk space.

You add additional physical hard disks to Server1.

You verify that the additional disks are available from the local Disk Management console.

You need to ensure that the additional disk space can be used to store DPM backups.

What should you ?

A.
From the DPM Administrator console, click Refresh.

B.
From the DPM Administrator console, click Disk Allocation.

C.
From the DPM Administrator console, click Add.

D.
From the DPM Administrator console, click Rescan.

Explanation:
To add disks to the storage pool

In DPM Administrator Console, on the navigation bar, click Management, and then click the Disks tab.

In the Actions pane, click Add.

The Add Disks to Storage Pool dialog box appears. The Available disks section lists the disks that you can add to the storage pool.

Select one or more disks, click Add, and then click OK.

Adding Disks to the Storage Pool
http://technet.microsoft.com/en-us/library/bb808852.aspx