The capacity of the IBM System Storage TS7650 ProtecTIER Deduplication Appliance can be upgraded in which of the following increments?（）

• A、7 TB to 18 TB to 36 TB
• B、4 TB to 5.4 TB to 7.9 TB
• C、1 TB to 100 TB to 1000 TB
• D、any size up to and including 1000 TB