单项选择题
A customer had been given a proposal for a p5-570 6-way 32GB system running in Full Partition mode. After review， the customer asked that the configuration be modified to enhance the reliability and availability of the solution. However， the customer does not want to pay for HACMP or additional machines. What change would be most likely to improve the reliability of the solution？（）
A.Add CUoD memory.
B.Provide CUoD processors.
C.Provide redundant disks on separate SCSI buses.
D.Add redundant power supplies in the p5-570 CEC （Central Electronics Complex）.
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