An administrator configured the following command on FortiGateconfig router ospfsec reszart-mode graceful-restartWhich two statements correctly...

FortiGate is configured with graceful restart and will exit graceful mode, if the network topology changes

After the default 40 seconds wait time the OSPF neighbors will resume communication with the restarting router

The OSPF neighbor that receives the grace link-state advertisement (LSA) will enter into helper mode

In an HA cluster FortiGate devices will keep the OSPF routes in their routing table to avoid traffic interruption during an HA failover