What should the technical specialist discuss with the customer about capacity volumes on a single IBM DS8886?

A customer has mainframe storage and open systems storage on different storage platforms and would like to consolidate to a single storage system.

What should the technical specialist discuss with the customer about capacity volumes on a single IBM DS8886?
A . Mainframe hosts with CKD volumes and Open servers with FB volumes could use the same IBM DS8886 fiber host ports
B . Mainframe hosts with CKD volumes and Open servers with FB volumes could use the same IBM DS8886 HAs, when using different ports for each
C . Mainframe hosts with CKD volumes and Open servers with FB volumes can share the same flash ranks
D . When using Global Mirror for CKD volumes only, the customer need to purchase the Copy Services License for the total capacity including the FB capacity.

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Answer: D