The one-to-one deployment model, also referred to as personally enabled, involves assigning a single device to an individual user, allowing personalization while maintaining organizational oversight via MDM. This model is a strategic choice for organizations aiming to balance user flexibility with management control, often used in education or enterprise settings. Application Programming Interface (API) (option A) is a technical tool, not a deployment model. Over-the-air (OTA) enrollment (option B) is a method of enrolling devices, not a deployment model defining ownership or usage. The Apple Platform Deployment Guide identifies one-to-one as a core deployment model alongside shared and BYOD scenarios.