Which taxiways can be omitted from clearance when they share the same identifier at the approach end of the runway?

In air traffic control, when identifying taxiways that can be omitted from clearance due to sharing the same identifier at the approach end of the runway, connecting taxiways are the correct choice. Connecting taxiways typically serve as links between different sections of the taxiway system and runways, enabling aircraft to maneuver efficiently on the airfield. Since they often do not have a significant operational impact or may not be directly involved in the aircraft's immediate route to the runway, they can be excluded from clearance instructions to streamline communication and reduce complexity.

The other types of taxiways mentioned serve specific purposes that are generally more critical in terms of safety and navigation. For example, primary taxiways are essential routes that lead to and from the runway, while service taxiways are utilized for access to hangars or terminals and access taxiways provide entry points to the apron area. Thus, omitting clearance for connecting taxiways while still ensuring the safety and efficiency of the aircraft's movement is a common practice.