Option D is the best-supported answer for the endpoint behavior described. An input guardrail configured to block detected PII prevents the offending request from proceeding normally and returns a blocking response. Inference tables record request and response payloads, so the response represents the guardrail outcome rather than a hypothetical answer the model might otherwise have produced. Blocking a request is distinct from disabling its audit logging, and a blocked response is not inherently an empty response. This answer assumes the phone number is detected and the record is successfully logged. Databricks documents best-effort logging and version-dependent gateway behavior; newer guardrail implementations may return a structured blocking message rather than the same HTTP error format used by older endpoints. Guardrail documentation , inference-table documentation