The difference between a frontier and a boundary is
A) a frontier is a tangible geographic area where a boundary is an infinitely thin line.
B) a frontier is uninhabited and a boundary is densely populated.
C) a frontier is controlled by state coalitions while a boundary is controlled by one state.
D) a frontier marks the ends of a territory while a boundary is dynamic in its representation of territory.
E) most boundaries have been replaced by frontier zones.
Answer: A
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