Which recommendation algorithm technique did Amazon patent in 2017, causing controversy in the e-commerce industry for its potential to reshape how online retailers suggest products?

In today's digital economy, recommendation algorithms drive significant portions of retail revenue. These sophisticated systems analyze customer data to personalize shopping experiences and increase sales. How well do you understand the technology behind modern retail recommendation systems that shape consumer behavior and business success? Test your knowledge of this crucial intersection of technology, marketing, and retail strategy.

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Anticipatory Shipping (predicting purchases before customers order)
Social Graph Analysis (recommending based on friends' purchases)
Visual Recognition Pairing (matching products to customer-uploaded images)
Cross-Category Bundling (suggesting complementary products from different departments)