Correct option is C
• Statement I is correct: RAID uses data redundancy (Mirroring/Parity) to ensure data reliability even if one disk fails.
• Statement II is correct: RAID minimizes single point of failure by distributing data across multiple disks, enhancing fault tolerance.
• Statement III is correct: Certain RAID levels (RAID 0, RAID 5, RAID 10) improve I/O performance and aggregate storage capacity through striping & parallel access.
• Therefore, all three statements correctly describe the functional benefits of RAID systems in storage architecture.