Which approach allows the Gateway configuration to be completely backed up into a manageable size in the least amount of time?

You intend to upgrade a Check Point Gateway from R65 to R76. To avoid problems, you decide to back up the Gateway.

Which approach allows the Gateway configuration to be completely backed up into a manageable size in the least amount of time?
A . snapshot
B . database revision
C . backup
D . upgrade export

Answer: D