Which mathematical algorithm fundamentally transformed e-commerce product recommendations and is credited with generating 35% of Amazon's revenue?

Modern e-commerce platforms leverage sophisticated mathematical algorithms to personalize user experiences. From product recommendations to dynamic pricing, mathematics drives retail innovation. This poll tests your knowledge about the mathematical foundations that power the online shopping experiences we encounter daily. Can you identify which algorithm revolutionized product recommendation systems across major e-commerce platforms?

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Collaborative Filtering Matrix Factorization
K-means Clustering Analysis
Gradient Boosting Decision Trees
Recurrent Neural Networks (RNNs)