The most professional way to evaluate this question is to map the symptom to the Nutanix feature responsible for that function rather than reacting to secondary details in the prompt. The correct response is B, meaning “The Prism Central Active Directory service connection is misconfigured or has failed.”. Monitor mode is designed for observation rather than enforcement. In Nutanix Flow, it discovers and visualizes matching traffic so an administrator can validate real application behavior before converting the policy to active enforcement. That is why the correct response focuses on visibility, not blocking. Identity-based controls in Flow depend on accurate mapping between Active Directory information and the categories or groups referenced by policy. If that mapping is wrong, the policy logic can be correct and access will still fail. From a troubleshooting standpoint, the validation path is policy scope first, then categories or identity mapping, then hitlog evidence, service definition, and finally policy precedence. By contrast, A does not fit because it targets a different layer of the Nutanix networking and security stack than the one causing the outcome here. C does not fit because it targets a different layer of the Nutanix networking and security.