Which statement about using RMAN stored scripts is true?（）

• A、To create and execute an RMAN stored script, you must use a recovery catalog.
• B、When executing a stored script and a command fails, the remainder of the script is executed, and a message is written to the alert log file.
• C、RMAN stored scripts can always be executed against any target database that is registered in the recovery catalog.
• D、When you execute a stored script, it always executes using the persistent channel settings previously set with the CONFIGURE command.