The correct operation requires the POST method to create a new instance within the interface list. According to the provided YANG tree (image_45bd0e.png), the container is singular: native/interface. Furthermore, the Cisco-IOS-XE-native model defines the subnet mask leaf as a dotted-decimal string (e.g., 255.255.255.0) rather than CIDR notation (e.g., 24). Option C is the only choice that correctly identifies the singular URI path, uses the POST method for creation, and formats the subnet mask correctly for the IOS XE native schema.

Option A: Uses the plural URI path interfaces, which does not match the provided YANG tree. It also uses CIDR notation ("24"), which is invalid for the native IP mask leaf.

Option B: While this image uses the POST method, it uses the incorrect plural URI interfaces and the incorrect CIDR notation for the subnet mask.

Option D: This option uses the PUT method. While PUT can sometimes be used to create, it is intended for replacing a resource; additionally, it uses the incorrect plural URI interfaces.

Cisco Systems. (2023). Programmability Configuration Guide, Cisco IOS XE Release 17.x. Chapter: RESTCONF Protocol. (Focus on "Data Resource Retrieval and Configuration").

Cisco Systems. Cisco-IOS-XE-native.yang Model Definition. Leaf: /native/interface/Loopback/ip/address/primary/mask.

RFC 8040. RESTCONF Protocol. Section 4.4.1 (POST Method) and Section 3.5.3 (Encoding Data).

Cisco DevNet. RESTCONF Learning Labs. Section: "Interacting with the IOS XE Native YANG Model."