A customer needs 2 TB of high availability storage for eBusiness applications. Their servers arecurrently connected to two EMC Symmetrix subsystems that are running RAID 1. They want toconsolidate all of the RAID 1 storage into an IBM System Storage DS6800. Which configurationsatisfies these capacity requirements?（）

• A、Two disk drive sets of 300 GB drives
• B、Four disk drive sets of 146 GB drives
• C、Eight disk drive sets of 73 GB drives
• D、Nine disk drive sets of 146 GB drives