The correct answer is C. The output of the CLI command get rule otvp status. In the Virtual Patching section, the study guide shows the workflow where FortiGate queries FortiGuard for device-specific vulnerabilities, receives OT virtual patching signatures, maps them to the device MAC address, and then explicitly displays the CLI verification command get rule otvp status together with fields such as Rule-name, Vuln_type, and Cve. This is the direct confirmation mechanism shown in the guide for checking whether OT devices have virtual patching rules associated with them.

The other options are less accurate for confirmation. The OT View page is for Purdue-level visualization, and the Asset Identity List page shows device and asset information, but neither is presented in the guide as the command or control used to verify virtual patching status. The study guide specifically uses get rule otvp status as the status check tied to virtual patching behavior.