Triple

Target class: Gilded Age event
Context triple: [Vanderbilt costume ball of 1883, instanceOf, Gilded Age event]

• A. Reconstruction-era event
  A Reconstruction-era event is a significant historical occurrence between 1865 and 1877 in the United States that shaped the political, social, and economic transformation of the post–Civil War South and the reintegration of formerly seceded states into the Union.
• B. event in 19th-century American economic policy
  A significant occurrence or decision in the United States during the 1800s that directly influenced the formulation, implementation, or transformation of national or regional economic policies, such as tariffs, banking systems, currency standards, or federal economic interventions.
• C. Progressive Era movement
  The Progressive Era movement was a broad reform effort in the late 19th and early 20th centuries in the United States aimed at addressing social, political, and economic injustices through government regulation, social welfare programs, and expanded democracy.
• D. 19th-century art event chosen
  A 19th-century art event is a historically situated gathering, exhibition, or performance in the 1800s where artworks were presented, debated, or experienced within the cultural and social context of the time.
• E. colonial-era event
  A colonial-era event is a historically significant occurrence that took place during a period when one nation exercised political, economic, or cultural control over foreign territories and populations.
• F. None of above.