Regarding the operation of deleting the path from the network management, which of the following...

Deleting a trail from the network layer only deletes the WDM trail at the network layer on the NMS side

Delete the path from the NE layer. Delete the path on the NE side and the NE layer together.

Once the network layer deletes the trail, the service will not be interrupted

After the path is deleted from the network layer and the network element, the service will be interrupted