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

The retail industry has undergone dramatic transformations throughout history. From ancient marketplaces to modern e-commerce giants, the evolution of how goods are sold reflects broader societal and technological changes. This trivia question focuses on a pivotal moment in retail history that forever changed how consumers shop. Test your knowledge about this revolutionary retail concept that transformed the shopping experience and set the foundation for modern retail chains.

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The self-service grocery store (Piggly Wiggly)
The department store (Macy's)
The mail-order catalog (Sears Roebuck)
The shopping mall (Country Club Plaza)