Correct Answer: CIn the scenario described, you are moving a volume from a FAS8200 to an AFF A700 system. In this context, data compaction is a feature that is typically utilized to optimize storage efficiency, and it is influenced by the volume's space guarantee setting. Setting the space guarantee to 'None' allows the system to take full advantage of space-saving features like data compaction and thin provisioning. Therefore, the correct volume parameter change to allow for data compaction is to adjust the space-guarantee setting.