Which retailer is credited with pioneering the first true self-service grocery store format in 1916, fundamentally changing store layouts and shopping behavior?

Before supermarkets became ubiquitous, grocery shopping was a completely different experience. Store clerks would retrieve items for customers from behind counters, and self-service was unheard of. The transition to modern retail layouts revolutionized how we shop and dramatically changed supply chain management, store efficiency, and the customer experience. Test your knowledge about this pivotal shift in retail history!

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Piggly Wiggly (founded by Clarence Saunders)
A&P (The Great Atlantic & Pacific Tea Company)
Safeway (founded as Skaggs Cash Stores)
Kroger (founded by Bernard Kroger)