192.168.3.1 is a loopback interface configured into router R2’s OSPF area 0. A ping from router R3 to this loopback fails.
Which of the following is a possible solution to the problem?
A . Add the “originate-default-route” option in the NSSA area configuration on router R3.
B . Add the “summaries” option to the NSSA area configuration on router R1.
C . Configure a static route on router R1 to 192.168.3.1.
D . Configure a default route on router R2.
Answer: B