Click the Exhibit button.You have configured graceful RE switchover (GRES), however you cannot complete the show system switchover command.Referring to the exhibit, what is the problem? A.The command is only available if a backup router is configured.B.The command is only available if non-stop routing is enabled.C.The command is only available if graceful restart is enabled.D.The command is only available on the backup Routing Engine.
