A customer using mainframe and open systems hosts decides to implement Virtual provisioning. What would be the most efficient way to use the pool resources?

A.
One combined pool for FBA and CKD devices

B.
As many FBA pools and as many CKD pools as practical

C.
One pool each for CKD and FBA devices with a large number of spindles

D.
As many RAO 5 pools for FBA devices and RAD 10 pools for CKD devices as practical