Which machine learning approach did Netflix famously use to improve its recommendation algorithm in 2009, offering a $1 million prize to the team that could enhance prediction accuracy by at least 10%?

As streaming platforms revolutionize how we consume film and television, they're also transforming retail models in the entertainment industry. Behind these platforms lie sophisticated machine learning algorithms analyzing viewer preferences and behaviors to increase engagement and reduce churn. Test your knowledge about how data science is reshaping the business of entertainment!

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Collaborative filtering with matrix factorization
Deep learning neural networks with reinforcement learning
Natural language processing on user reviews
Decision tree ensembles with gradient boosting