What could be a solution to make tape streaming happen during the backup?

Tape streaming is not happening while performing RMAN tape backup. On investigation, you find
that it is not because of the incremental backup or the empty file backup and that RMAN is
sending data blocks to the tape drive fast enough.
What could be a solution to make tape streaming happen during the backup?

A.
Configure backup optimization

B.
Configure the channel to increase MAXOPENFILES

C.
Configure the channel to increase the capacity with the RATE parameter

D.
Configure the channel to adjust the tape buffer size with the BLKSIZE option

Explanation:
In the ALLOCATE or CONFIGURE CHANNEL commands, the RATE parameter specifies the
bytes/ second that are read on a channel. You can use this parameter to set an upper limit for
bytes read so that RMAN does not consume excessive disk bandwidth and degrade online
performance. Essentially, RATE serves as a backup throttle. For example, if you set RATE 1500K,
and if each disk drive delivers 3 MB/ second, then the channel leaves some disk bandwidth
available to the online system.