Which pricing strategy, introduced in the 1880s by retail pioneer John Wanamaker, was considered revolutionary for establishing consumer trust and is credited as one of the most important retail innovations?

Throughout retail history, certain pricing strategies have emerged as game-changing innovations. These inventive approaches fundamentally altered how consumers perceive value and how businesses market products. This trivia question focuses on a revolutionary pricing strategy that was considered a major discovery in retail psychology and has influenced countless businesses worldwide. Test your knowledge of retail innovation history!

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One-price policy (price tags with fixed, non-negotiable prices)
Loss leader pricing (selling select items below cost)
Psychological pricing (prices ending in .99)
Bundle pricing (multiple products sold together at discount)