Which definition of the REST API for a Cisco APIC is true?

The Cisco APIC's REST API exposes the entire Management Information Model (MIM) as a set of managed objects. Each managed object has a corresponding class definition and associated methods (e.g., create, read, update, delete) that can be invoked programmatically via the API.

The REST API accesses the management information tree (MIT), it does not contain the tree itself; the MIT is an internal data structure of the APIC.

While the APIC REST API uses HTTPS messages and typically exchanges JSON or XML documents, this describes the transport and data format, not the fundamental definition of the API's programmatic entities.

The REST API is an interface for accessing and manipulating the configuration and state information stored within the APIC's management information tree, it does not store the information itself.