A client has a SAP production database with 10 TB of usable storage on a DS4700. The growthrate of the data is 50% per year. The majority of the data rapidly becomes reference data and isnot frequently accessed. The customer would like to implement a solution that would migrate thereference data to a less expensive disk. Which of the following would be the most cost effectivesolution?（）

• A、 N3400 Express with SnapVault 
• B、 DS5020 using SATA drives and TSM with HSM 
• C、 DS5300 with Tivoli Storage Productivity Center for Data 
• D、 DS8700 with Tivoli Storage Productivity Center for Replication