单项选择题

A. the possibility of changing the application so this no longer happens
B. with the XIV system's SATA basedapproach, storage costs are so low that over-provisioning is not an issue
C. the XIV system has immediate zero page reclamation features that will immediately return the volume to its original size
D. the XIV system has a white space reclamation feature that will return the volume to its original thin provisioned size over time