Which of the following is an advantage of role-based security?

Which of the following is an advantage of role-based security?
A . If you DROP a role that owns objects, those objects will also be dropped
B . Within a trusted connection. DB2 allows multiple roles to be associated with any given thread at any point in time
C . Roles are used to provide a more flexible technique than security group definitions or userids in assigning and controlling authorization
D . If a role creates an object, a user requires no additional privileges to access the object if the access uses that role as the object owner in the SQL statement

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Answer: A