Which retail innovation was first introduced by Piggly Wiggly founder Clarence Saunders in 1916, fundamentally changing how consumers interacted with products?

Before Amazon and Walmart dominated retail, there were groundbreaking innovations that changed how we shop forever. This trivia question explores a pivotal moment in retail history that transformed consumer behavior and set the foundation for modern shopping experiences. Test your knowledge of the revolutionary developments that shaped today's retail landscape!

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Self-service shopping (allowing customers to select their own merchandise)
Loyalty card program with purchase tracking
Barcode scanning at checkout
Shopping cart with wheels