A customer reported degraded performance with several of the applications that run on a VNX.
After reviewing the performance data on the array, you find that all the performance issues are
related to one RAID 5 RAID Group. Specifically, this RAID Group is performing 50 percent fewer
IOPS than previously.
What is the most likely reason?

A.
The RAID Group is rebuilding.

B.
The RAID Group is trespassed.

C.
Write cache is not configured.

D.
Read cache is not configured.