After a successful replica failover, you decide that you want to switch back to the original VM and permanently
transfer the changes that occurred in the replica VM while it was in the Failover State. Which course of action
should you choose?

A.
Change the initial Replication job to reverse the replication

B.
“Undo Failover”

C.
“Failback” + “Commit Failback”

D.
“Permanent Failover”

Explanation:
https://www.veeam.com/blog/replicating-vmware-vms-with-veeam-everything-you-need-to-knowabout-replica-failover.html