An EMC Avamar customers Gen-1 system with 4 TB of GSAN capacity has reached read-only threshold. The customer indicates that the deduplicated backup data accounts for approximately 3.5 TB.What is the most likely cause for the read-only threshold being reached? A.Deduplication rate is less than expected, accounting for the remaining GSAN capacityB.Combination of system overhead, logs, and checkpoints account for the remaining GSAN capacityC.RAIN overhead accounts for the remaining available GSAN capacityD.Checkpoints and logs account for the remaining GSAN capacity