Which innovative technology did Amazon first introduce in its Amazon Go grocery stores that eliminated traditional checkout lines?

The food retail landscape has been dramatically transformed by digital technologies in recent years. From mobile ordering to cashierless checkout systems, grocery retailers are leveraging technology to enhance customer experiences and streamline operations. This poll tests your knowledge about one of the most significant digital transformation initiatives in the food retail industry that has changed how millions of consumers shop for groceries.

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Just Walk Out technology (using computer vision, sensor fusion, and deep learning)
RFID tag scanning (using radio frequency identification for automatic product identification)
Smart cart technology (using weight sensors and barcode scanners in shopping carts)
Mobile self-scanning (using customer smartphones to scan products while shopping)