Which invention, first widely implemented in the 1930s, fundamentally transformed store layouts by allowing customers to select their own merchandise without clerk assistance?

The way products are arranged in stores has evolved dramatically over the decades, influenced by groundbreaking inventions and discoveries in retail psychology. Store layouts are carefully engineered systems designed to maximize sales and enhance customer experience. This trivia question explores a pivotal invention that revolutionized how products are displayed and how we shop.

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• The shopping cart (invented by Sylvan Goldman in 1937)
• The self-service grocery store (pioneered by Clarence Saunders with Piggly Wiggly in 1916)
• Barcode scanning technology (invented by Norman Woodland and Bernard Silver in 1949)
• Electronic point-of-sale systems (first implemented by IBM in 1973)

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