You deploy more than one application to the same WebLogic container. The security is set on JavaEE level and all deployed JavaEE applications use the same security roles.    What is your recommendation for an architecture with those requirement?（）

• A、Combine all applications into a single one.
• B、Define global roles on the WebLogic Domain level.
• C、Use Ms Active Directory to keep the roles there. 
• D、Use Oracle Identity and Access Management solution to simplify the management.
• E、Keep role mapping in the external WebLogic Role Mapped developed for that solution.