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

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

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

B.
upgrade_export will back up routing tables, hosts files, and manual ARP configurations, where backup and snapshot will not.

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

D.
upgrade_export is operating system independent and can be used when backup or snapshot is not available.