A cloud service provider is associating chargeback values with their storage tiering solution as follows: Tier 1 - RAID 10 on SAS 15,000 RPM disks. Sold at $0.25/GB Tier 2 - RAID __?__ on SAS 15,000…

A cloud service provider is associating chargeback values with their storage tiering solution as follows:

Tier 1 - RAID 10 on SAS 15,000 RPM disks. Sold at $0.25/GB Tier 2 - RAID ? on SAS 15,000 RPM disks. Sold at $0.21/GB Tier 3 - RAID 5 on SAS 10,000 RPM disks. Sold at $0.17/GB Tier 4 - RAID 0 on SATA 10,000 RPM disks. Sold at $0.12/GB Storage tiering is arranged by disk and RAID types and the cumulative benefits of both. The cloud service provider administrator is attempting to determine which RAID type to configure for Tier 2 storage. Which of the following RAID types should the administrator use for Tier 2 storage?