Refer to the exhibit. Which additional configuration is necessary for R1 and R2 to become OSPF neighbors?
A. R1
!
router ospf 1
no passive-interface Fastethernet0/0
!
B. R2
!
router ospf 10
no network 10.1.1.6 0.0.0.0 area 0
network 10.1.1.6 0.0.0.0 area 1
!
C. R1
!
interface FastEthernet0/0
ip ospf mtu-ignore
!
R2
!
interface FastEthernet0/1
ip ospf mtu-ignore
!
D. R1
!
no router ospf 1
router ospf 10
network 10.1.1.5 0.0.0.0 area 0
