The answer is scale. The scale helps measure the ratio of distance on the ground. However, because of the curves in some parts of the land, many geographers would have a hard time getting the correct scale of a given land distance. Most of them would use the method generating globe in order to get the estimated distance.
Country B will suffer the most. They gain money by exporting metals, and since they are a Single-Resource country, they won’t have anything else to export.
