Which two statements are true about dropping a pluggable database (PDB)?

A.
The data files associated with a PDB are automatically removed from disk.

B.
The backups associated with a PDB are removed.

C.
A PDB must have been opened at least once after creation.

D.
A PDB must be in mount state or it must be unplugged.

E.
A PDB must be in closed state.

F.
A dropped and unplugged PDB can be plugged back into the same multitenant container
database (CDB) or other CDBs.