Whichstoragesubsystemprovidesintegratedsupportofpolicy-basedautomatedplacementandsubsequenttieringandmigrationofdata?()

Whichstoragesubsystemprovidesintegratedsupportofpolicy-basedautomatedplacementandsubsequenttieringandmigrationofdata？（）

A、SONAS

B、DS5000