Which three statements are true concerning unplugging a pluggable database (PDB)?（）

• A、The PDB must be open in read only mode.
• B、The PDB must be dosed.
• C、The unplugged PDB becomes a non-cdb.
• D、The unplugged PDB can be plugged into the same multitenant container database (CDB)
• E、The unplugged PDB can be plugged into another cdb.
• F、The PDB data files are automatically removed from disk.