Answer :
A.an edge on a map because you won't have any boundary's on a ruler, scarf, or a street sign
Answer:
A.) an edge on a map.
Explanation:
This is the most appropriate case in which to use the word "boundary." A line that sets a limit on a map (for example, to limit the extent of a country) is called "boundary." It can also be called "border" or "frontier." Although the word "edge" is often a synonym, it cannot be used in the same way in this particular case.