You are examining the performance of a weekly backup. You notice that the utilization for the Symmetrix front-end director CPUs involved in the backup is very low.
What might be causing this low utilization?

A.
Backup application is using a large I/O block size

B.
Data access is random

C.
Backup application is executing an equal number of reads and writes

D.
Data is stored on RAID 1-protected devices