In 1916, which revolutionary retail store first introduced the self-service shopping concept where customers could select their own merchandise without clerk assistance?

The way we shop today seems obvious, but the retail experience has evolved dramatically over time. Before the early 20th century, customers would give their shopping lists to clerks who would fetch items from behind counters. The innovation of self-service shopping fundamentally transformed retail history, empowering customers and changing store layouts forever. Test your knowledge about this pivotal moment in retail history!

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Piggly Wiggly (Memphis, Tennessee)
A&P Great Economy Store (Jersey City, New Jersey)
King Kullen Grocery (Queens, New York)
Safeway (American Falls, Idaho)