The network designer provides the following network diagram for OSPF Single-Area to start the configuration process.

Based on the diagram, configure the R2 following the details below.
1. Enable OSPF process 2
2. Enable OSPF on all interfaces with a single command

(A)
R2# router ospf 3
R2# network 0.0.0.0 255.255.255.255 area 0
R2# interface GigabitEthernet0/0
R2(config-if)# ip address 158.159.170.2 255.255.255.0
R2# interface GigabitEthernet0/1/0
R2(config-if)# ip address 158.159.160.2 255.255.255.0
(B)
R2# router ospf 2
R2# network 0.0.0.0 255.255.255.255 area 0
R2# interface GigabitEthernet0/0
R2(config-if)# ip address 158.159.170.2 255.255.255.0
R2# interface GigabitEthernet0/1/0
R2(config-if)# ip address 158.159.160.2 255.255.255.0
(C)
R2# router ospf 2
R2# network 0.0.0.0 255.255.255.255 area 0
R2# interface GigabitEthernet0/0
R2(config-if)# ip address 158.159.170.2 255.255.0.0
R2# interface GigabitEthernet0/1/0
R2(config-if)# ip address 158.159.160.2 255.255.0.0
(D)
R2# router ospf 2
R2# network 0.0.0.0 255.255.255.255 area 1
R2# interface GigabitEthernet0/0
R2(config-if)# ip address 158.159.170.2 255.255.255.0
R2# interface GigabitEthernet0/1/0
R2(config-if)# ip address 158.159.160.2 255.255.255.0

B is the correct answer.

The answer A is incorrect as it has router ospf 3.
The answer C is incorrect as it has wrong subnet mask on the interfaces.
The answer D is incorrect as it has wrong area.