Basic Concept: Logical routers are available only after Advanced Routing is enabled globally. This is a general setting change on the firewall.

Why D is Correct: Checking advanced routing in General settings is the required first action before logical router objects can be configured.

Why A is Wrong: Changing the virtual router type from "default" to "advanced" is related to management or logging, but it does not provide the required Panorama operation, rule hierarchy behavior, or dual-log forwarding outcome.

Why B is Wrong: Activating an advanced routing subscription is related to management or logging, but it does not provide the required Panorama operation, rule hierarchy behavior, or dual-log forwarding outcome.

Why C is Wrong: Committing a new advanced routing software module is related to management or logging, but it does not provide the required Panorama operation, rule hierarchy behavior, or dual-log forwarding outcome.