What can cause difficulty in IBM Tivoli Storage Manager (TSM) upgrades and Independent
Software Vendor migrations with the Migration Engine for Butterfly software?

A.
Migration of data stores is always required.

B.
Unallocated data on source media can cause a delay.

C.
Deduplicated data on the source media is not supported.

D.
The upgrades of TSM can only occur when the source TSM server is not running.