Which retail innovation, introduced in the 1910s, fundamentally changed shopping by allowing customers to select their own merchandise without clerk assistance for the first time?

The history of retail has seen dramatic transformations over centuries. From ancient marketplaces to modern shopping experiences, retail innovations have shaped economies and cultures. This trivia question explores a pivotal moment in retail history that forever changed how consumers interact with products. Test your knowledge of the revolutionary retail concepts that laid the foundation for today's shopping landscape!

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Self-service grocery stores (Piggly Wiggly)
Department stores (Macy's)
Mail-order catalogs (Sears)
Discount chain stores (Woolworth's)