Which technology forms the foundation of most modern music streaming recommendation systems?

The music streaming era has revolutionized how we discover new artists and songs. Behind every 'Recommended for You' playlist lies sophisticated technology working to predict your next favorite track. This poll tests your knowledge of how modern music recommendation systems actually function to connect listeners with new music they'll likely enjoy. Do you understand what powers the algorithms that shape your listening experience?

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Collaborative filtering that analyzes listening patterns across users with similar taste profiles
Direct artist payments that promote songs based on marketing investments
Random selection algorithms that ensure equal exposure for all content
Blockchain-based verification that confirms listener authenticity before suggesting content