A customer with a small IT budget has one data center. Their main application is a database   running on an IBM System Storage DS8000. The database has a data change rate of 50% per day. Once a week， they must do a point-in-time backup from the database to tape. The time it takes to run the backup now exceeds the backup window allowed. The customer requests a proposal to reduce database downtime caused by running backups， with nearly zero impact to production volumes.  In addition to the tape backup， which DS8000 feature should a technical specialist propose（）

• A、FlashCopy
• B、FlashCopy SE
• C、Metro Mirror
• D、Global Mirror