Which retailer first introduced the revolutionary concept of 'self-service shopping' where customers could select their own merchandise without clerk assistance, fundamentally changing retail history?

Throughout history, retail has evolved dramatically, from ancient marketplaces to modern shopping experiences. Revolutionary retail concepts have transformed how people shop and how products are sold. This trivia question explores a pivotal moment in retail history that fundamentally changed consumer behavior and set the foundation for modern shopping experiences we take for granted today. Test your knowledge of retail innovation history!

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Piggly Wiggly (1916)
Woolworth's (1879)
A&P Grocery (1859)
Marshall Field's (1852)