______ can be used to create an artificial line that substitutes for a natural feature to provide guidance to the search crews.

______ can be used to create an artificial line that substitutes for a natural feature to provide guidance to the search crews.

______ can be used to create an artificial line that substitutes for a natural feature to provide guidance to the search crews. 








A. Trail tape or ribbon
B. The Trail watcher line
C. A hiking trail
D. A creek









Answer: A