When should you create a role? ()
A、A.To simplify the process of creating new users using the CREATE USER xxx IDENTIFIED by yyy statement.
B、B.To grant a group of related privileges to a user.
C、C.When the number of people using the database is very high.
D、D.To simplify the process of granting and revoking privileges.
E、E.To simplify profile maintenance for a user who is constantly traveling.