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

Throughout history, retail innovations have dramatically changed how people shop and consume products. From the first department stores to modern e-commerce platforms, these transformations have shaped economies and cultures worldwide. This trivia question explores one of the most significant retail innovations that changed consumer behavior and set the foundation for modern shopping experiences.

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Piggly Wiggly self-service stores
Woolworth's five-and-dime stores
Sears mail-order catalog
Marshall Field's department store model