What describes the use of Tape Stacking with the embedded storage node on an EMC Disk Library (EDL)?

What describes the use of Tape Stacking with the embedded storage node on an EMC Disk Library (EDL)?
A . Backups are created on small virtual tapes and then cloned to one large tape.
B . Backups are created on large virtual tapes and then cloned to several small tapes.
C . Backups are stacked in a buffer area and then written to an offsite EDL at a later time.
D . Backups are stacked in a buffer area and then written to a local EDL at a later time.

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Answer: A