What describes the distribution of volume data residing in an SC series storage array that has 15K and 7K as the back-end?

Assume a storage administrator is using the recommended storage profile.

What describes the distribution of volume data residing in an SC series storage array that has 15K and 7K as the back-end?
A . New and frequently accessed replay data in Tier 1 RAID 5 Aged replay data and inaccessible data in Tier 3 RAID 6
B . New data in Tier 1 RAID 10 Frequently accessed replay data in Tier 1 RAID 5
Aged replay data and inaccessible data in Tier 3 RAID 6
C . New data in Tier 1 RAID 10 Frequently accessed replay data in Tier 2 RAID 5 Aged replay data and inaccessible data in Tier 3 RAID 6
D . New and frequently accessed replay data in Tier 1 RAID 10 Aged replay data and inaccessible data in Tier 3 RAID 6

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Answer: B