Which two statements are true about the DUPLICATE command?

Examine the command to duplicate a database:

RMAN> DUPLICATE TARGET DATABASE TO cdb PLUGGABLE DATABASE pdb1, pdb5;

Which two statements are true about the DUPLICATE command?

A.
The SPFILE is copied along with the datafiles of the pluggable databases (PDBs).
The root and the seed database in the container database (CDB) are also duplicated.

B.
A backup of pdbi and pd35 must exist before executing the command.

C.
The duplicate command first creates a backup, and then duplicates the PDBs by using the backup.

D.
An auxiliary instance must be started with the initialization parameter ENABLE_PLUGGABLE_DATABASE set to TRUE.