Explanation/Reference:
Any copy in the hierarchy tree can be deleted without effecting the parents or children.
Incorrect Answers:
B: Deleting a snapshot in the middle of the tree triggers an asynchronous process. This process merges the metadata of the deleted entity's children with that of their grandparents. This ensures that the tree structure is not fragmented.
C: It is possible to create copies of the production volumes in order to protect against logical data corruption. Multiple copies can be created over a short interval in order to provide a fine RecoverPoint Objective (RPO) in a cyclic manner (a superior RPO to a backup).
References: https://www.emc.com/collateral/white-paper/h13035-wp-introduction-to-xtremio- snapshots.pdf, page 14