Which statement is true about the RMAN run block execution?

Examine the following set of RMAN commands:
RKAN> CONFIGURE CHANNEL del DEVICE TYPE DISK FORMAT ‘ /u02/backup/%U’ ; RKAN> RUN
{ALLOCATE CHANNEL chl DEVICE TYPE DISK;
EXECUTE SCRIPT arc_backup;
}
Which statement is true about the RMAN run block execution?

A.
The script is executed and both DC1 and chi channels are used for script execution.

B.
The execution of the script fails because multiple channels cannot exist simultaneously.

C.
The persistent configuration parameter, DC1, is overridden because a new channel is allocated in the
RMAN run block.

D.
The new channel, chi, is ignored because a channel has been configured already.