You have a server named Server1 that runs Windows Server 2012 R2.
You download and install the Windows Azure Online Backup Service Agent on Server1.
You need to ensure that you can configure an online backup from Windows Server Backup.
What should you do first?

A.
From Windows Server Backup, run the Register Server Wizard.

B.
From Computer Management, add the Server1 computer account to the Backup Operators group.

C.
From a command prompt, run wbadmin.exe enable backup.

D.
From the Services console, modify the Log On settings of the Windows Azure Online Backup Service Agent.

Explanation:
A)
Enables you to back up and restore your operating system, volumes, files, folders, and applications from a command prompt.
B)
To register a server for use with Windows Azure Backup you must run the register server wizard
http://technet.microsoft.com/en-us/library/hh831677.aspx