You work as a network Exchange administrator at Company.com.Company.com has its headquarters located in Miami and branch office located in Toronto.The Company.com network currently consists of a single Active Directory forest containing a single domain named Company.com.The Company.com organization makes use of Microsoft Exchange Server 2010 as their messaging solution.Company.com has recently made the Toronto office administrators members of a custom management role group which is configured to allow members to manage recipients.During your routine maintenance you discover that Toronto office administrators are able to manage recipients in both offices.During the course of the business week you receive instruction from Company.com to ensure that the Toronto office administrators are able to manage recipients in the Toronto office only.  What should you do？（）

• A、You should consider having a new linked role group created.You should then have the Toronto office administrators added to the role group.
• B、You should consider having a new role created.You should then have the management role entries added to the role.
• C、You should consider having a management scope created and associated to the role group.
• D、You should consider having a management role assignment policy created and associated to the role group.