You have a hosted Exchange organization. All servers in the organization have Exchange
Server 2010 Service Pack 1 (SP1) installed.
You need to group a set of users for administrative delegation.
What should you create?

A.
a managed folder mailbox policy

B.
a new distribution group

C.
a new management role

D.
a new role assignment policy

Explanation:
When you change role assignments, the changes you make will probably be between role
groups and role assignment policies. By adding, removing, or modifying role assignments to
or from these role assignees, you can control what permissions are given to your
administrators and users, in effect turning on and off management of related features.
Regular role assignments enable the role assignee to access the management role entries
made available by the associated management role. If multiple management roles are
assigned to a role assignee, the management role entries from each management role are
aggregated and applied. This means that if a role assignee is assigned the Transport Rules
and Journaling roles, the roles are combined, and all the associated management role
entries are given to the role assignee. If the role assignee is a role group or role assignment

policy, the permissions provided by the roles are then given to the users assigned to the role
group or role assignment policy.
The management role assignment policy is a special object in Exchange 2010. Users are
associated with the role assignment policy when their mailboxes are created or if you
change the role assignment policy on a mailbox. This is also what you assign end-user
management roles to. The combination of all the roles on a role assignment policy defines
everything that the user can manage on his or her mailbox or distribution groups.

http://technet.microsoft.com/en-us/library/dd638100.aspx
http://technet.microsoft.com/en-us/library/dd335131.aspx