A. Assign the computer account of the Central Administration site server permission to the Configuration Manager 2007 site. Assign the computer account of the Central Administration site server permissions to the Microsoft SQL Serverdatabase instance.

B. Extend the Active Directory schema and assign the Central Administration site server permissions to the System\System Management container.

C. Connect the Configuration Manager 2007 primary site as a child primary site of the Configuration Manager 2012 primary site.

D. Connect the Configuration Manager 2012 primary site as a child primary site of the Configuration Manager 2007 primary site.