View the exhibit, which contains the output of a real-time debug, and then answer the question below.

Which one of the following statements describes why the update is failing?
A. The update should be using port 53 or port 8888, instead of port 443.
B. FortiGate is unable to resolve the required FQDN (service.fortiguard.net) for AV and IPS updates.
C. FortiGate is unable to establish a TCP connection with FD
D. The administrator should use the execute update-wf command instead.