Which scientific innovation did Amazon first implement in their Amazon Go stores that eliminated traditional checkout lines?

The intersection of science and retail has created groundbreaking technologies that transform how customers shop. Major retailers have invested billions in cutting-edge scientific innovations to gain competitive advantages. This poll tests your knowledge of a significant scientific retail technology that changed the industry landscape and how we interact with products. Can you identify which scientific advancement was truly revolutionary in retail?

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Computer vision and deep learning systems that automatically detect when products are taken or returned to shelves
RFID-enabled shopping carts that automatically scan items as they're placed inside
Biometric payment systems that use palm recognition to process transactions
Quantum computing-based inventory management that predicts and prevents stockouts