Which American grocery store chain is credited with inventing the modern supermarket concept by introducing the first self-service shopping model in 1930?

Before the 1930s, grocery shopping was a completely different experience. Store clerks would fetch items for customers from behind counters, and the concept of self-service was virtually unknown. One groundbreaking retail innovation forever changed how we shop for food. Test your knowledge about this pivotal moment in food retail history that shaped the grocery shopping experience we know today.

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Piggly Wiggly
A&P (The Great Atlantic & Pacific Tea Company)
Kroger
Safeway