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 king distribute.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 king distribute whilst also making sure that dean austin cannot make any changes to any of the 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 my distributions groups management role.
• C、you should consider having dean austin added to king distribute’ s managed by list.
• D、you should consider having dean austin assigned as a group moderator forking distribute.