Which retail innovation, first introduced in the 1910s, fundamentally changed how customers shopped by allowing them to select products themselves rather than requesting items from clerks?

The way we shop has evolved dramatically over the centuries. From ancient marketplaces to modern e-commerce, retail innovations have shaped not only how products reach consumers but also society itself. This trivia question focuses on a pivotal moment in retail history that revolutionized the shopping experience and set the foundation for modern consumer culture. Test your knowledge of how our shopping habits and retail environments have transformed through time.

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Self-service shopping (Piggly Wiggly stores)
Department store catalogs (Sears Roebuck)
Shopping malls (Country Club Plaza)
Retail loyalty programs (S&H Green Stamps)