Which budget-sensitive solution should be offered to this customer?

A customer’s goal is to optimize the existing backup infrastructure containing Veritas Backup Exec software and an IBM TS3310 Tape Library. Currently, the two L TO-5 drives are running at 80% utilization. Because the customer expects a 30% capacity increase over the next three years, the backup window will be missed in the future.

Which budget-sensitive solution should be offered to this customer?
A . Add a second IBM TS3310 with LTO-5 drives installed at a secondary site for disaster recovery
B . An expansion unit for the existing 13M TS3310 Tape Library to gain more cartridge slots
C . Upgrade the IBM TS3310 by replacing the LTO-5 drives and cartridges with LTO-7 drives and cartridges
D . Add two IBM TS7620 appliances with VTL licenses and replication software for redundancy

Answer: C