Given the following partial configuration for Router A:interface serial 0ip address 10.1.1.1
255.255.255.0encapsulation frame-relayip ospf network point-to-multipointrouter ospf 7network
10.1.1.0 0.0.0.255 area 0Which two statements are correct? (Choose two.)

A.
DR/BDR elections do not take place.

B.
OSPF neighbor statements are not necessary.

C.
The router is restricted to a hub and spoke topology.

D.
The area 0 NBMA cloud is configured as more than one subnet.