Which retailer first introduced the revolutionary 'self-service' shopping model in 1916, allowing customers to select their own merchandise without clerk assistance?

The history of retail has been shaped by revolutionary approaches to customer service. Before the 20th century, most shopping experiences followed a clerk-assisted model where products were kept behind counters. Then, one innovation permanently changed how customers interact with merchandise and transformed the retail landscape forever. Test your knowledge of this pivotal moment in retail history!

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Piggly Wiggly
Woolworth's
A&P (The Great Atlantic & Pacific Tea Company)
Marshall Field's