How will FortiManager try to get updates for antivirus and IPS?

View the following exhibit:

How will FortiManager try to get updates for antivirus and IPS?
A . From the list of configured override servers with ability to fall back to public FDN servers
B . From the configured override server list only
C . From the default server fdsl.fortinet.com
D . From public FDNI server with highest index number only

Answer: A