Which mathematical algorithm revolutionized e-commerce personalization by enabling the famous 'customers who bought this also bought' recommendation systems?

The intersection of mathematics and e-commerce has transformed how we shop online. Complex algorithms and mathematical models now power everything from product recommendations to inventory management. This poll tests your knowledge of a breakthrough mathematical innovation that revolutionized personalization in online retail, creating billions in additional revenue across the industry. Do you know which algorithm made the biggest impact on how products are recommended to consumers?

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Collaborative Filtering Matrix Factorization
Random Forest Regression
K-means Clustering
Support Vector Machines