Which early 20th century retail innovation first popularized the self-service shopping model that revolutionized store layouts and became the foundation for modern supermarkets?

The evolution of retail has been marked by revolutionary innovations that transformed how people shop. From ancient marketplaces to digital commerce platforms, retail history reflects broader social and technological changes. This trivia question explores a pivotal moment in retail history that fundamentally altered consumer behavior and set the stage for modern shopping experiences. Test your knowledge of how retail strategies have evolved through time!

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Piggly Wiggly (1916) - the first true self-service grocery store with checkout stands
Marshall Field's Department Store (1907) - introduced the bargain basement concept
Woolworth's Five-and-Dime (1911) - pioneered fixed-price merchandising displays
Sears Catalog Stores (1925) - combined mail-order and in-store shopping experiences