Which four statements about users in Oracle Database 12c are correct?
A. A common user cannot have the same name as any local user across all PDBs.
B. A common user can be created only in the root container.
C. A local user with the proper privileges can also create a common user.
D. If a PDB is closed, the common and local users of the PDB are not visible.
E. A common user with the proper privileges can create a common user by using the CONTAINER=CURRENT clause.
F. A common user is one that has the same username and authentication credentials across multiple PDBs.
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