Due to this rationalization of delivery cost in the U.S., the postal densities of the most sparsely populated areas are higher than the densities of the most sparsely populated areas of France.
In France. letters cost less to mail within the country than in the US.
mnli hypothesis: In France. letters cost less to mail within the country than in the US. premise: Due to this rationalization of delivery cost in the U.S., the postal densities of the most sparsely populated areas are higher than the densities of the most sparsely populated areas of France.