Which country is credited with opening the world's first modern self-service supermarket, forever changing how people shop for groceries?

Test your knowledge about famous retailers and their geographic origins! Many global retail brands have interesting stories tied to specific locations that shaped their development and identity. Understanding where these retail giants originated provides insight into their business strategies, cultural influences, and expansion patterns. This trivia question explores the geographic roots of a famous retail innovation that revolutionized how we shop.

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United States (Piggly Wiggly, founded 1916 in Memphis, Tennessee)
United Kingdom (Sainsbury's, converted to self-service in 1950s)
France (Carrefour, opened first hypermarket in 1963)
Germany (Aldi, pioneered discount grocery model in 1960s)