An administrator installs two new LTO4 drives in a tape library with two existing LTO3 tape drives.
What should the administrator configure next?
A. the two new LTO4 tape drives into an existing storage unit with the existing tape drives
B. a new storage unit for each tape drive
C. a new storage unit for the LTO4 tape drives
D. an existing storage unit because LTO4 is backwards compatible with LTO3