Answer:
C. it does not show mountains regions
Step-by-step explanation:
From this model of the United States shown, the likely limitation is that it does not show the mountain regions.
From the map, the countries to the North and South are shown, major rivers are shown, and the oceans surrounding America are shown.
The map would have made use of different colors to represent the various height or depth of America's terrain if it were to include showing the mountain regions.