Triple

Target entity: U.S.–Mexico border
Context triple: [Cities of the Plain, settingLocation, U.S.–Mexico border]

• A. U.S.–Mexico border chosen
  The U.S.–Mexico border is the international boundary separating the United States and Mexico, stretching from the Pacific Ocean to the Gulf of Mexico and serving as a major focal point for migration, trade, and security issues.
• B. US–California border
  The US–California border is the state boundary that separates California from neighboring U.S. states such as Oregon, Nevada, and Arizona, stretching from the Pacific coast inland across diverse desert and mountain landscapes.
• C. Baja California border corridor
  The Baja California border corridor is a transnational region along the Mexico–United States border in the state of Baja California, encompassing key border cities and crossings that serve as major hubs for trade, migration, and cultural exchange.
• D. Canada–United States border
  The Canada–United States border is the world’s longest international land boundary, separating Canada and the United States across diverse terrains from the Atlantic to the Pacific and Arctic Oceans.
• E. Mexico–United States border crossings
  Mexico–United States border crossings are official ports of entry—by road, rail, and on foot—where people and goods legally pass between Mexico and the United States under binational control and inspection.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.