Which historical retail innovation, introduced in the 1840s, revolutionized shopping by allowing customers to browse merchandise freely without asking clerks to retrieve items from behind counters?

Throughout history, retail has evolved dramatically with innovations that shaped how we buy and sell. From ancient marketplaces to modern e-commerce, retail strategies have reflected technological capabilities and cultural needs of each era. This trivia question focuses on an early retail innovation that revolutionized shopping experiences and set the foundation for modern retail display techniques. Test your knowledge of retail history!

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Department stores with open floor plans
Mail-order catalogs with illustrated products
Fixed pricing systems replacing haggling
Glass-enclosed window displays