Triple

Target entity: Canada–United States border
Context triple: [Lake Erie watershed, crossesInternationalBoundary, Canada–United States border]

• A. Canada–United States border chosen
  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.
• B. Canada–United States border region
  The Canada–United States border region is the extensive transboundary area where the two countries meet, encompassing shared ecosystems, waterways, and communities that require coordinated environmental and policy management.
• C. Canada–United States border crossings
  Canada–United States border crossings are the official points of entry where people and goods legally pass between Canada and the United States by land, sea, or certain bridges and tunnels.
• D. Washington–British Columbia border
  The Washington–British Columbia border is the international boundary separating the U.S. state of Washington from the Canadian province of British Columbia, running from the Pacific coast through coastal waters and rugged inland terrain.
• E. U.S.–Mexico border
  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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.