A system administrator has reported degraded performance with several of the applications that run on an EMC VNX. After reviewing the performance data on the array, you discover that all performance issues are related to one RAID 5 RAID Group. Specifically, this RAID Group is performing 50 percent fewer IOPS than before.
What is the most likely reason for this issue?
A. RAID Group is rebuilding
B. RAID Group is trespassed
C. Write cache is not configured
D. Read cache is not configured
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