What should the administrator do to accomplish this task?

A backup administrator is migrating their tape drive backup solution from LTO-4 to LTO-6 generation. Both LTO-3 and LTO-4 media are presently in use. All LTO-4 drives are to be replaced by LTO-6 drives, but the administrator plans to avoid replacing a maximum amount of the tapes already in use.

What should the administrator do to accomplish this task?
A . Back up all critical data on at least LTO-4 tapes in order to be read it from their new LTO-6 drives.
B . Back up all critical data from LTO-3 tapes to LTO-4 tapes
Next, back up LTO-4 tapes to LTO-5 tapes
Next, back up LTO-5 tapes to LTO-6 tapes
C . Nothing, the administrator will still be able to read any tape currently in use will their LTO-6 drive and will be able to retrieve data if needed
D . Back up all critical data from LTO-3 tapes to LTO-4 tapes
Next, back up LTO-4 tapes to LTO-5 tapes

Answer: A