单项选择题

There is a power outage and all servers are shut down properly by the uninterruptible power supply (UPS) software. When one of the servers starts up it displays a logical drive failed error. This server has two processors, 16GB of memory, and a RAID 5 array with 10 drives.
Which of the following is the MOST likely cause?（）

A. A failed RAID controller
B. Two failed processors
C. Two failed sticks of memory
D. Two failed drives

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