Which strategic grocery store layout feature, introduced in the 1940s, fundamentally changed shopping behavior by forcing customers to walk through the entire store?

Modern supermarkets are carefully designed to influence consumer behavior in ways most shoppers never notice. From product placement to aisle organization, every element is strategically planned to maximize purchases. This trivia question explores one of the most fundamental and influential grocery store design principles that transformed retail food shopping forever. Test your knowledge about the psychology behind the stores we visit regularly!

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Placing dairy products at the back of the store
The introduction of shopping carts with child seats
The serpentine single-path layout (like IKEA uses today)
Placing essential items (milk, bread, eggs) at opposite ends of the store