Which label describes a fake AI-powered checkout system that relies on humans to verify purchases?

• A. Wizard of Oz testing
• B. Fireflies.ai
• C. 3D printed mockups
• D. Amazon Just Walk Out

Answer: (D)

In Wizard of Oz testing, you present a system as if it’s powered by intelligent software, but a human is actually doing the work behind the scenes. For a fake AI‑powered checkout that relies on a person to verify purchases, this label fits because the user experiences what seems like autonomous AI, while a human handles the verification in real time. This lets researchers study how people react to AI features, where trust cues come from, and how the workflow feels, without needing real AI to be fully developed yet. The other options don’t fit this scenario: one is a real AI product used for meeting notes, another is a non-digital prototype method, and the last is a genuine automated checkout technology, not a testing label involving human-in-the-loop deception.