Which iconic retail pricing strategy was first widely adopted during the Great Depression to combat declining sales?

The 1930s Great Depression was not just a time of economic hardship but also a period of significant retail innovation. As consumer spending plummeted, retailers had to adapt with new strategies and business models. Some of the most recognizable retail brands and practices we know today emerged from this challenging era. Test your knowledge about how retail business adapted and evolved during one of history's most difficult economic periods.

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Loss leader pricing (selling certain items below cost to attract customers)
The 'one-price' system (eliminating haggling/bargaining)
Psychological pricing (prices ending in .99)
Subscription-based retail models