An access policy that uses URL reputation values is defined. Which option best describes what happens if a reputation is not available for a URL?
A. The URL check is not triggered, and the default policy action is applied.
B. The URL check fails, and the traffic is dropped.
C. The URL check is unknown, and the traffic is quarantined.
D. The URL check is not triggered and, by default, the user is prompted to take an action to permit or deny.