You are a system administrator for your company.You plan to protect a SharePoint Server 2007 farm by using Data Protection Manager (DPM) 2007. The farm contains the following servers:
Two Microsoft SQL Server 2005 cluster node servers named Server1 and Server2 Two front-end Web servers named Server3 and Server4 in a Network Load Balance cluster
You need to ensure that the SharePoint environment is protected. You want to achieve this goal by using the minimum amount of DPM Agent licenses. On which servers should you install the DPM Agent?

A.
All SQL cluster nodes and one of the front-end Web servers

B.
All SQL cluster nodes and all front-end Web servers

C.
One of the SQL cluster nodes and one of the front-end Web servers

D.
One of the SQL cluster nodes and all front-end Web servers