The best explanation for the international supply chain between the United States and Mexico regarding beef exports is Option C: United States and Mexican producers rely on each other’s market to sell certain beef products.
This option highlights the interdependence of both countries in terms of beef production and consumption, reflecting how each market benefits from the other by providing different products that meet consumer preferences. It acknowledges that while both countries export similar amounts of beef to each other, the reasons for this could include branded products, quality distinctions, and varying consumer preferences.