Which retail innovation, first introduced in 1916 by Piggly Wiggly in Memphis, Tennessee, fundamentally changed how consumers shopped for groceries?

Before supermarkets dominated the food retail landscape, grocery shopping looked completely different. This poll tests your knowledge about a pivotal innovation that transformed how consumers purchase food products and revolutionized the entire food retail industry. Understanding these historical retail innovations helps us appreciate how food shopping experiences have evolved over decades to create the convenience we take for granted today.

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Self-service shopping (allowing customers to select their own items rather than requesting them from clerks behind counters)
The introduction of shopping carts with wheels
The implementation of barcode scanning at checkout
The concept of store loyalty cards and membership programs