Which command would you use to make sure Router A never becomes a designated router?

A. Router(config)#no ospf designated
B. Router(config-router)#no ospf designated
C. Router(config-router)#passive interface gi 0/0
D. Router(config-if)#ip ospf priority 0

D. All routers by default have an OSPF priority of 1. If you set the priority to 0, the router will never become a designated router. This command must be set in the interface.