A customer requests a solution that will enhance the availability of their servers and ensure that the time needed to recover from an Operating System fault is at a minimum.  What solution do you recommend？ （）

• A、Use RAID protection and add more memory
• B、Install Operating System in RAID 0 （Parity） Disk Configuration
• C、Install Operating System in RAID 5 Disk Configuration
• D、Use RAID protection and ensure systems are backed-up daily