Which retail innovation, introduced in the 1930s, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance, fundamentally changing the retail customer journey?

Before department stores, supermarkets, and online shopping, retail looked vastly different. This poll explores a pivotal moment in retail history that transformed how consumers shop and how businesses market their products. Test your knowledge of retail evolution that shaped modern consumer culture and established practices we now take for granted.

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Self-service shopping (pioneered by Piggly Wiggly stores)
Mail-order catalogs (popularized by Montgomery Ward)
Department store price tags (introduced by John Wanamaker)
Loyalty card programs (created by S&H Green Stamps)