Which retail innovation, first introduced in 1916, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance?

The history of retail is filled with fascinating innovations that shaped how we shop today. From ancient marketplaces to modern e-commerce, retail evolution reflects changing consumer behaviors, technological advancements, and cultural shifts. This trivia question focuses on a pivotal innovation in retail history that fundamentally changed the shopping experience and established many practices we now take for granted.

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