What Technology Is Used by Dell EMC Unity Snapshots

Multiple Choice

What technology is used by Dell EMC Unity Snapshots?

A) Copy on First Write, which requires a storage resource reserved to hold original data that changed to preserve the point-in-time view.
B) Redirect on White, which requires no storage resource to create a Snapshot, writes are redirected on parent pool.
C) Copy on First Write, which requires no storage resource is needed to create a Snapshot, writes are copied pool.
D) redirect on Write, which requires a storage reserved to hold original data that changed to preserve the point-in-time view.