A client purchased a new CLARiiON that contains:
Five 10,000RPM 73GB Fibre Channel drives
Ten 10,000RPM 146GB Fibre Channel drives
Fifteen 15,000RPM 36GB Fibre Channel drives
Fifteen 7,200RPM 320GB ATA drives.

Which hot spare configuration utilizes the least number of drives for hot spares while still allowing for each hot spare to be as global as possible?

A.
One 320GB 7,200RPM ATA drive as a hot spare

B.
One 146GB 10,000RPM Fibre Channel drive and one 320GB 7,200RPM ATA drive as a hot spares

C.
One 36GB 15,000RPM Fibre Channel drive, one 146GB 10,000RPM Fibre Channel drive, and one 320GB 7,200RPM ATA drive as hot spares

D.
One [1] 73GB 10,000RPM Fibre Channel drive, one 36GB 15,000RPM Fibre Channel drive, one 146GB 10,000RPM Fibre Channel drive, and one 320GB 7,200RPM ATA drive as hot spares