Which command configures the IBM Tivoli Storage Manager V6.3 server database backup, and
ensures that the backup uses two data streams with the device class dbback?

A.
Set dbrecovery dbback numstreams=2

B.
Update devclass dbback mountlimit=2

C.
Set dbrecovery dbback concurrentstreams=2

D.
Update devclass dbback mountlimit=2 concurrentstreams=2

Explanation: