What is the result of the last SET CONTAINER statement …

You are connected using SQL* Plus to a multitenant container database (CDB) with SYSDBA privileges
and execute the following sequence statements:

What is the result of the last SET CONTAINER statement and why is it so?

A.
It succeeds because the PDB_ADMIN user has the required privileges.

B.
It fails because common users are unable to use the SET CONTAINER statement.

C.
It fails because local users are unable to use the SET CONTAINER statement.

D.
If fails because the SET CONTAINER statement cannot be used with PDB$SEED as the target
pluggable database (PDB).