Examine the following RMAN command: RMAN> CONFIGURE ENCRYPTION FOR DATABASE ON; RMAN> BACKUP DATABASE PLUS ARCHIVELOG; Which prerequisite must be met before accomplishing the backup?（）

• A、Provide a password for the encryption
• B、Set up an Oracle wallet for the encryption
• C、No setup is required as it is a default encryption method
• D、Both Oracle wallet and password must be set up for the encryption