單項選擇題

An administrator is ordering a new Power 550. They will mirror rootvg and are concerned about single points of failure. 
Which of the following features should be ordered()

A.Dual I/O planar, dual disk drives, dual SCSI adapters
B.Dual disk drive enclosures, dual disk drives, extra media bay
C.Dual disk drive enclosures, dual disk drives and dual SCSI adapters
D.Dual I/O planar, extra media bay, dual disk drives

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