Which mathematical algorithm revolutionized retail recommendation systems in the early 2000s, leading to the 'customers who bought this also bought' feature widely used today?

In today's data-driven retail environment, advanced mathematical models power decision-making across the industry. From predictive analytics to inventory optimization, mathematics forms the foundation of modern retail data systems. This poll tests your knowledge about a significant mathematical breakthrough that revolutionized retail recommendation systems and how it impacted product discovery for consumers.

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Singular Value Decomposition (SVD)
Random Forest Classification
K-means Clustering
Gradient Boosting Machines