Which retail giant is correctly paired with the mathematical innovation they're most known for pioneering in the retail sector?

The retail industry increasingly relies on mathematical algorithms and data science to optimize operations. Major retail giants have developed proprietary mathematical models that have revolutionized their business. This poll tests your knowledge about the intersection of mathematics and retail giants - specifically which mathematical innovation is correctly paired with the company that pioneered its use in retail.

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Amazon - The A9 algorithm (incorporating purchase history, contextual relevance, and text-matching into product search rankings)
Walmart - The TensorFlow-based recommendation system (first commercial application of quantum computing for inventory prediction)
Target - The RedCard Predictor (neural network that identified pregnancy before customers announced it publicly)
Alibaba - The Golden Ratio Placement Model (store layout optimization based on mathematical proportions)