Which retail innovation, first 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 history of retail is filled with groundbreaking innovations that transformed how people shop. From humble general stores to modern e-commerce giants, retail has evolved dramatically over centuries. This trivia question focuses on a pivotal historical retail innovation that fundamentally changed consumer behavior and set the foundation for modern shopping experiences. Test your knowledge of retail history with this challenging question!

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Piggly Wiggly self-service grocery stores
Sears mail-order catalog system
A&P economy store model
Marshall Field's department store concept