Which option best infers the purpose of using grid lines on a large-scale map?
A. A map with these features might be used to find the exact location of cities on a continent
B. A map with these features might be used to compare cultural patterns in different countries
C. A map with these features might be used to find population density in different areas of a city
D. A map with these features might be used to find the exact location of campsites on a trail