You are managing the APPPROD database as a DBA. You plan to duplicate this database in the same system with the name DUPDB. You issued the following RMAN commands to create a duplicate database: Which three are the prerequisites for the successful execution of the above command?（）
- A The source database should be open
- B The target database should be in ARCHIVELOG mode if it is open
- C RMAN should be connected to both the instances as SYSDBA
- D The target database backups should be copied to the source database backup directories
- E The password file must exist for the source database and have the same SYS user password as the target