You work as a network Exchange administrator at Company.com.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 added a distribution group named KingDistribute.During the course of the business week you receive instruction from Company.com to ensure that a user named Dean Austin is able to add and remove members from KingDistribute whilst ensuring you prevent Dean Austin from modifying all other groups. What should you do？（）

• A、You should consider having Dean Austin assigned the Distributions Groups management role.
• B、You should consider having Dean Austin assigned the MyDistributionsGroups management role.
• C、You should consider having Dean Austin added ti KingDistribute’s Managed by list.
• D、You should consider having Dean Austin assigned as a group moderator for KingDistribute.