The Laredo North Border Patrol Station deploys all available resources, including service canines, throughout its area of responsibility. The Laredo North station's daily duties include line watch, sign cutting, and freight train checks. Laredo North Agents also perform traffic checks at one of the largest Border Patrol traffic checkpoints. Service canines are deployed to conduct freight train checks and traffic checkpoint operations. From the information given above, it CANNOT be validly concluded that A) line watch is not the only critical duty at the Laredo North Border Patrol Station B) if a resource is not deployed in the performance of the duties of the Laredo North Border Patrol Station, then the resource does not belong to that station C) no resources of the Laredo North Border Patrol Station are unused in the performance of the Station's duties D) without exception, all of the duties of the Laredo North Border Patrol Station require the use of service canines E) service canines are among the resources employed at the Laredo North Border Patrol Station