A customer has an existing VNX system and plans to add more disks. They are using AVM in a
production environment and need the same level of performance that they currently have.
What is the recommended way to expand the system capacity?

A.
Add matching RAID groups to each back-end bus

B.
Fill all remaining empty slots on all buses

C.
Add eight RAID groups to any back-end bus

D.
Fill the capacity of a selected back-end bus