The City Beautiful movement emerged from the 1893 Chicago World’s Fair (Columbian Exposition), which showcased grand architecture and civic design, inspiring planners to apply these principles to cities. Option A (Chicago World’s Fair) is correct. The APA’sAICP Certification Exam Content Outline(2022), under “Fundamental Planning Knowledge,” states, “The City Beautiful movement was a direct result of the 1893 Chicago World’s Fair, which promoted civic beauty and order.” Option B (Hoover Commission Report) relates to government efficiency in the 1940s. Option C (Nash’s plan for London) influenced Regency-era planning, not City Beautiful. Option D (Olmsted’s Central Park) predates the movement and focuses on naturalistic design. TheCPC Study Manual(2024) confirms, “The City Beautiful movement originated from the 1893 Chicago World’s Fair,” supporting option A.