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

To optimize exchange on a national scale, regions often harness their comparative advantages—specializing in the production of goods and services where they hold a relative efficiency. This strategic allocation enables more efficient resource use and boosts overall productivity. Coupled with advancements in technology, the flow of goods becomes smoother and faster, enhancing the marketplace's interconnectedness. In practice, nations forge trade agreements that eliminate or reduce tariffs and other trade barriers. Such treaties, like NAFTA, foster an environment where businesses can thrive by accessing broader markets. This ultimately leads to increased trade volumes and improved economic performance as companies specialize and innovate, benefiting from larger consumer bases while also providing diverse options for buyers.