Your network contains a single Active Directory domain. You plan to deploy System Center 2012 Configuration Manager. The

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Your network contains a single Active Directory domain.
You plan to deploy System Center 2012 Configuration Manager.
The hierarchy will have a Central Administration Site and five Primary Sites.
You need to ensure that you can target user groups for software distribution.
The solution must minimize network traffic.
Which Configuration Manager discovery method should you use?

A. Active Directory User Discovery and Active DirectoryGroup Discovery on the primary sites
B. Active Directory User Discovery and Active Directory Group Discovery on the Central Administration site
C. Active Directory User Discovery on the Central Administration site and Active Directory Group Discovery on the primary sites
D. Active Directory User Discovery on the primary sites and Active Directory Group Discovery on every site