How do you undo all these changes?

You’ve configured an interface with an IP address and commited the change. You then commited a change that added an exception in a firewall filter to allow this network through the filter. You realize that this work was done on the wrong router.
How do you undo all these changes?

A.
rollback 2

B.
rollback 1

C.
rollback 0

D.
rollback 3