What are the characteristics of this RAID type?

A customer is discussing the purchase of an IBM Storwize V7000 storage system and  needs to decide which pre-set RAID algorithm to use. The customer is aware of an option called “Balance RAID 10” and has asked for a description of how it functions.

What are the characteristics of this RAID type?
A . Data and two stripe of parity are striped across all array members.
B . Data and one stripe of parity are striped across all array members.
C . Data on all drives in the array use the same drive channel wherever possible.
D . Data is mirrored on two array members and across two enclosure drive channels.

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Answer: D