Refer to the exhibit. How was the OSPF default gateway entry for R2 determined?
-Default routes are automatically injected by OSPF into all advertisements.
-A static default gateway route is defined in the configuration of R2.
-The default-information originate command is applied on R1.
-The ISP defines the gateway of last resort and automatically passes it to R1 and R2.
-The ip default-gateway command is applied on R2.