What is the purpose of a role?

A.
To define exactly what a specific user can do within a particular database once they have been
authenticated.

B.
To group a collection of privileges together so that they can be simultaneously granted to and
revoked from multiple users.

C.
To establish a credible relationship between DB2 and an external entity, such as a database
administrator or a middleware server.

D.
To group a collection of users together so that they can be simultaneously granted and revoked
specific authorities and privileges.

Explanation: