A network administrator is configuring the routers in the graphic for OSPF. The OSPF process has been started and the networks have been configured for Area 0 as shown in the diagram. The network…

Assigning a higher OSPF priority to RouterB's Fa0/0 directly influences the DR election, as the router with the highest interface priority on the segment is elected DR.

Assigning 172.16.1.130 to the Fa0/0 interface changes the interface IP, but the router ID is chosen from the highest loopback or highest active interface - this does not guarantee RouterB gets a higher router ID than the other routers.

A loopback interface is always up and its IP address is used as the router ID if it is the highest IP on the device; a higher router ID than all other routers on the segment acts as the tiebreaker when priorities are equal, making RouterB the DR.

Setting RouterB's Fa0/0 priority to zero makes it ineligible to be elected as DR or BDR, which is the opposite of the goal.

Setting the OSPF priority of RouterA's and RouterC's Fa0/0 interfaces to zero makes those routers ineligible to become DR or BDR, ensuring RouterB with a non-zero priority wins the election.

Without additional configuration, there is no guarantee that RouterB will win the DR election over RouterA and RouterC, so further configuration is required.