Certkiller .com is buying an NS700 with two trays of ATA disks to be used as its primary backup destination device. According to best practices, how is the first tray configured?

A.
Three 4+1 RAID-5 Groups

B.
Three 4+1 RAID-3 Groups

C.
One 8+1 RAID-3 Group, one 4+1 RAID 3 Group and one hot spare

D.
Two 6+1 RAID-5 Groups and one hot spare