What is unique about the Quality of Service (QoS) function within IBM DS8000 as compared to other IBM storage products?
A . I/O Priority Manager can be integrated with the System z WLM
B . I/O Priority Manager is only supported for z Systems
C . The IBM DS8000 is the only IBM storage system offering QoS
D . System z and Open/distributed volumes can use the same managed Performance Groups
Answer: A