A distribution customer requires a fault-tolerant disk subsystem for their x3650 M2 server. They purchased and attached two EXP3000 External Expansion Enclosures to a ServerRAID MR10M RAID controller. The customer requires the highest performance possible， regardless of cost for the EXP-based drives. Which RAID level meets these requirements？（）

• A、RAID-1
• B、RAID-5
• C、RAID-10
• D、RAID-50