__________________ enables large-scale Android deployments across multiple device makers with no manual set up. (fill in the blank)

Zero-touch enrollment is the correct answer because it allows organizations to pre-configure devices to automatically provision themselves with management policies and apps upon first boot, without requiring manual intervention from IT or end-users. This streamlines large-scale deployments across various device manufacturers. EMM token is incorrect because while EMM tokens are used in device provisioning, they typically require manual entry or scanning, which doesn't fit the "no manual set up" criterion for large-scale, automated deployments. QR code is incorrect because QR code enrollment, while efficient, still requires a user to scan the code on each device, which is a manual step and not as scalable or automated as zero-touch for very large deployments.