Final answer:
A milk run is indeed a route on which a truck delivers products from a single supplier to multiple retailers or from multiple suppliers to a single buyer. This is true and typical of the dairy industry, where the perishability of products like milk necessitates efficient transport pathways.
Step-by-step explanation:
A milk run refers to a delivery route that optimizes logistics and supply chain management. The statement that a milk run is a route on which a truck either delivers product from a single supplier to multiple retailers or goes from multiple suppliers to a single buyer location is true. This system is often used in the dairy industry, where the perishability of milk necessitates quick and efficient transport from producers to consumers in order to maintain freshness.
Dairy farming has a long and rich history in the United States, with areas like the Northeast, Great Lakes regions, and even California being substantial contributors to the nation's milk production. The proximity of dairy farms to large population centers, or milksheds, is crucial as it allows for dairy products to reach consumers quickly. Improvements in refrigeration and transportation have allowed these milksheds to expand to radii of over 500 miles, enabling rural dairy lands to serve urban areas effectively.