What is the primary benefit of using the command upgrade_export over either backup or snapshot?

What is the primary benefit of using the command upgrade_export over either backup or
snapshot?

A.
upgrade_export is operating system independent and can be used when backup or snapshot is
not available.
B. upgrade_export will back up routing tables, hosts files, and manual ARP configurations, where
backup and snapshot will not.

C.
The commands backup and snapshot can take a long time to run whereas upgrade_export will
take a much shorter amount of time.

D.
upgrade_export has an option to back up the system and SmartView Tracker logs while backup
and snapshot will not.