Which retail innovation, first introduced in 1916 by Clarence Saunders, fundamentally changed how customers interacted with products and is considered the foundation of modern supermarket shopping?

The history of retail has dramatically shaped how we shop today. From humble beginnings to complex consumer experiences, retail innovations have transformed not just how products are sold, but how societies function. This trivia question explores a pivotal moment in retail history that forever changed the shopping landscape and consumer behavior. Test your knowledge about this revolutionary development that we now take for granted!

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Self-service grocery store (Piggly Wiggly)
Shopping mall (Market Square)
Department store catalog (Sears Roebuck)
Discount chain store (Woolworth's)