A company has a 30 TB multi-vendor storage environment attached to System i and open systems. They are concerned about the time and effort caused by frequent migrations to new storage hardware for open systems data. In addition to consolidating their storage to a single platform， they would like to take advantage of advanced features such as Easy Tier and implement a three-site business continuity strategy.  Which product provides the best long-term solution for this company（）

• A、IBM System Storage DS8000
• B、IBM XIV Storage System
• C、IBM System Storage N series
• D、IBMStorwize V7000