Which retail innovation, introduced in 1916 by Clarence Saunders, revolutionized shopping by allowing customers to select their own merchandise rather than having clerks gather items for them?

The evolution of retail spaces has dramatically changed how we shop throughout history. From small general stores to massive department stores, and now to digital marketplaces, retail innovations have shaped consumer culture. This trivia question focuses on a pivotal development in retail history that forever changed the shopping experience and influenced store layouts we still see today.

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Piggly Wiggly self-service grocery stores
Marshall Field's bargain basement concept
Woolworth's five-and-dime stores
Sears Roebuck mail-order catalog showrooms