How is a FlexClone volume different than a snapshot?

A.
A FlexClone volume is the same as a snapshot until you split the FlexClone to remove all restrictions on the
parent.
B.
A FlexClone volume is a copy of all data blocks in a volume while a snapshot only references data blocks.
C.
A Flexclone volume is a writeable copy of a patent volume while a snapshot is read-only.
D.
A FlexClone volume is a separate copy of all data blocks within a parent volume that lives outs.de of the
volumes while the snapshot lives within the volume.
How about C. ?
http://www.ant.hu/sites/default/files/u3/netapp_snapshot_ds-2477.pdf
http://www.netapp.com/ca/system/pdf-reader.aspx?cc=ca&m=ds-2837-flexclone.pdf&pdfUri=tcm:44-59979
“A snapshot copy is a read-only”
“a flexclone replica is writable snapshot”
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