Which additional feature on the IBM Storwize V5010 is a chargeable upgrade?

A customer is evaluating an IBM Storwize V5010 solution and wants to know what additional software functions are available.

Which additional feature on the IBM Storwize V5010 is a chargeable upgrade?
A . FlashCopy
B . Encryption
C . Data Reduction Pools
D . Compression

Answer: A

Explanation:

Reference: http://www.redbooks.ibm.com/redpieces/pdfs/sg248162.pdf