In what year was the folding shopping cart first introduced to grocery stores, revolutionizing food retail?

Shopping carts are a fundamental part of the modern grocery shopping experience, but they weren't always around. This trivia question explores the fascinating history behind this retail innovation that revolutionized how we shop for food. Test your knowledge about when and why this essential food shopping tool was introduced to consumers.

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1937, by Oklahoma grocery store owner Sylvan Goldman who noticed customers stopped shopping when baskets became too heavy
1921, by A&P supermarket chain founder John Hartford as part of the first self-service grocery store model
1952, by Piggly Wiggly founder Clarence Saunders who patented it alongside his self-service store concept
1945, by Raymond Loewy who designed it for Safeway stores during post-war retail expansion