Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.Which two RMAN commands may be; used to back up only the PDB1 pluggable database?（）

• A、BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container
• B、BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container
• C、BACKUP DATABASE while connected to the PDB1 container
• D、BACKUP DATABASE while connected to the boot container
• E、BACKUP PLUGGABLE database PDB1 while connected to PDB2