Which mathematical technique revolutionized retail personalization by enabling the analysis of high-dimensional customer data while preserving privacy?

In the world of retail analytics, mathematics plays a crucial role in understanding customer behavior and optimizing business strategies. Advanced algorithms and statistical models have revolutionized how retailers make decisions about inventory, pricing, and personalization. This poll tests your knowledge about a significant mathematical innovation that transformed retail customer analytics and personalization capabilities in recent years.

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Differential Privacy
Markov Chain Monte Carlo
Fourier Transform Analysis
Bayesian Network Modeling