What is a function of an HP Virtual Library System?

A.
provides additional virtual devices and leverages Die existing EVA infrastructure
B.
enables administrators to change backup software and monitoring policies
C.
increases the capacity and thus the complexity of a SAN environment
D.
accelerates backup performance in complex SAN and iSCSI environments
Explanation:
Reference:
https://h10057.www1.hp.com/ecomcat/hpcatalog/specs/provisioner/05/AG168A.htm