When does Fractional Reservation reserve space from the volume?

A.
Volume Creation

B.
LUN Creation

C.
LUN SnapMirror

D.
Volume Snapshot

Explanation:
Fractional reserve is a volume option that determines how much space Data
ONTAP will reserve for Snapshot overwrite data for LUNs and space-reserved files to be used
after all other space in the volume is used.. The default value is 100%, however, with the
introduction of the autodelete functionality, NetApp generally recommends setting
fractional_reserve = 0 and using the autodelete functionality. Data ONTAP removes or reserves
this space from the volume as soon as the first Snapshot copy is created