Complex sentence: The law presumes the geography of the area is flat without any rivers, roads or mountains to alter a consumer's decision of where to travel to buy goods, it also assumes consumers are indifferent between the actual cities.
Split into simpler sentences: The law presumes the geography of the area is flat without any rivers, roads or mountains to alter a consumer's decision of where to travel to buy goods. It also assumes consumers are indifferent between the actual cities.