Refer to the graphic, which of the following statements is true about OSPF topology and configuration?
A . A stable OSPF neighbor relationship can be set up between R1 and R2.
B . After the default network type of the interface on R1 is restored to broadcast, a stable OSPF neighbor relationship can be set up between R1 and R2.
C . After the default network type of the interface on R1 is restored to broadcast and the hello packet sending interval is changed to 10s, a stable OSPF neighbor relationship can be set up between R1 and R2.
D . Compared with R1, R2 is more likely to become the DR because the DR priority of the interface on R2 is lower than that of R1.
Answer: C