Refer to the exhibit.

A customer has an existing CX4-480 that is more than three years old. You have been asked to
review the array health and design a new VNX to replace the old array.
You notice that write cache is full at times on Storage Processor A. What is the likely cause of the
problem that will need to be addressed in the new design?

A.
Drive workload peaks are overloading two private RAID Groups

B.
Write Cache is frequently full for both Storage Processors

C.
Flash drives for FAST Cache are causing overload of Bus 0 and Bus 1

D.
User has configured too many pools resulting in uneven extent distribution