Triple

Target class: National Park System unit
Context triple: [Civil War Defenses of Washington, instanceOf, National Park System unit]

• A. United States National Park Service unit chosen
  A United States National Park Service unit is a designated protected area or site—such as a park, monument, seashore, or historic site—managed by the National Park Service for the preservation of natural, cultural, and historical resources and for public enjoyment.
• B. national park area
  A national park area is a protected geographic region designated by a government to conserve natural landscapes, ecosystems, and wildlife while providing opportunities for public recreation and education.
• C. United States National Historical Park
  A United States National Historical Park is a protected area designated by the federal government to preserve and interpret places of national historical significance, often encompassing multiple sites or a large landscape associated with important events, people, or themes in American history.
• D. National Scenic Area
  A National Scenic Area is a designated region recognized and protected for its outstanding natural beauty, distinctive landscapes, and cultural or recreational value, managed to conserve its character while allowing compatible public enjoyment and sustainable use.
• E. National Heritage Area
  A National Heritage Area is a region designated by the U.S. Congress where natural, cultural, and historic resources form a cohesive, nationally important landscape managed through partnerships rather than federal land ownership.
• F. None of above.