Which retail innovation, first introduced in 1930s America, fundamentally changed shopping patterns and eventually led to the concept of modern shopping festivals?

The history of retail is filled with innovations that transformed how we shop. From ancient marketplaces to modern digital commerce, retail evolution reflects broader economic and social changes throughout human history. This poll tests your knowledge about a pivotal moment in retail history that changed consumer behavior forever and set the foundation for modern shopping festivals and consumer trends.

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Self-service supermarkets (like Piggly Wiggly)
Black Friday post-Thanksgiving sales
Planned seasonal discounting (introduced by department stores)
Mail-order catalogs with seasonal themes