A company has 15 locations and a slow IP connection to the central department where a large IBM Tivoli Storage Manager (TSM) server is installed. The internet connection delivers 2048 KB/s and the backup window is five hours. At each location there are 50 servers which have changed data of 1 GB each. How can all systems be backed up within the window?

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A.
use TSM for SAN

B.
perform an incremental backup to a central TSM server

C.
install a TSM server at each location and perform a local backup

D.
save all changed files at a special directory and schedule to archive these files daily to a central TSM server