When was the first self-service grocery store (considered the precursor to modern supermarkets) opened in the United States?

Test your knowledge about one of history's most significant retail transformations that changed how consumers shop forever. This pivotal moment in retail history fundamentally altered store layouts and shopping habits across America and eventually the world. Do you know when this revolutionary concept first appeared and transformed the consumer experience?

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1916 (Piggly Wiggly in Memphis, Tennessee)
1930 (King Kullen in Queens, New York)
1905 (A&P Economy Store in Jersey City, New Jersey)
1924 (Ralph's Grocery in Los Angeles, California)