Which option best analyzes how exchange becomes more efficient at a national scale?(1 point) Responses Places within a country specialize based on comparative advantage, meanwhile better technologies enable exchange. Places within a country specialize based on comparative advantage, meanwhile better technologies enable exchange. Quaternary industries develop that benefit existing retail structures in local economies by connecting them to other places around the country. Quaternary industries develop that benefit existing retail structures in local economies by connecting them to other places around the country. Countries enter into treaties that encourage trade, such as the North American Free Trade Agreement. Countries enter into treaties that encourage trade, such as the North American Free Trade Agreement. Urban centers refocus on primary industries, leading to the development of secondary industries that encourage exchange