If port2 is detected dead by FortiGate, which expected behavior is correct?

Refer to the exhibits.

Exhibit A shows the SD-WAN performance SLA and exhibit B shows the SD-WAN member and the static routes configuration.

If port2 is detected dead by FortiGate, which expected behavior is correct?
A . Port2 becomes alive after one successful probe is detected.
B. The SD-WAN interface becomes disabled and port1 becomes the WAN interface.
C. Dead members require manual administrator access to bring them back alive.
D. Subnets 10.0.20.0/23 and 172.20.0.0/16 are reachable only through port1.

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Answer: D