Which retail innovation from the 1930s fundamentally changed store layouts and gave birth to the modern shopping experience we know today?

Throughout history, retail marketing and store layouts have evolved dramatically, transforming how consumers interact with products. From ancient marketplaces to modern shopping experiences, certain innovations stand out as true game-changers. This trivia challenges you to identify a pivotal moment in retail history that fundamentally altered the consumer experience and set the foundation for practices we still see today.

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The shopping cart, invented by Sylvan Goldman in 1937, which allowed customers to browse and collect more items than they could carry
The barcode system, first tested in 1932, which revolutionized inventory management and checkout processes
The department store escalator, patented in 1934, which enabled multi-level shopping and strategic product placement
The self-service grocery model, introduced by Piggly Wiggly in 1936, eliminating counter service and allowing customers to select their own products