Refer to the graphic, which of the following statements is true about OSPF topology and configuration?

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.

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Answer: C