Which configuration set accomplishes this goal?

Refer to the exhibit.

A network engineer is configuring OSPF between router R1 and router R2. The engineer must ensure that a DR/BDR election does not occur on the Gigabit Ethernet interfaces in area 0.

Which configuration set accomplishes this goal?
A . R1(config-if)interfaceGi0/0
R1(config-if)ipospf network point-to-point
R2(config-if)interface Gi0/0
R2(config-if)ipospf network point-to-point
B . R1(config-if)interfaceGi0/0
R1(config-if)ipospf network broadcast
R2(config-if)interface Gi0/0
R2(config-if)ipospf network broadcast
C . R1(config-if)interfaceGi0/0
R1(config-if)ipospf database-filter all out
R2(config-if)interface Gi0/0
R2(config-if)ipospf database-filter all out
D . R1(config-if)interfaceGi0/0
R1(config-if)ipospf priority 1
R2(config-if)interface Gi0/0
R2(config-if)ipospf priority 1

View Answer

Answer: A

Explanation:

Broadcast and Non-Broadcast networks elect DR/BDR while Point-topoint/ multipoint do not elect DR/BDR. Therefore we have to set the two Gi0/0 interfaces to point-to-point or point-to-multipoint network to ensure that a DR/BDR election does not occur.