Refer to the exhibit.

All routers have simultaneously been reloaded and the DR election has concluded as expected.
What state is RTB in?

A.
2WAY/DROTHER

B.
2WAY/BDR

C.
2WAY/DR

D.
FULL/DROTHER

E.
FULL/BDR

F.
FULL/DR

Explanation:
The point of this question is about the select principles of DR and BDR.
DR and BDR election is done via the Hello protocol. Hello packets are exchanged via IP multicast
packets (Appendix B) on each segment. The router with the highest OSPF priority on a segment
will become the DR for that segment. The same process is repeated for the BDR. In case of a tie,
the router with the highest RID will win. The default for the interface OSPF priority is one.
Remember that the DR and BDR concepts are per multiaccess segment. Setting the ospf priority
on an interface is done using the ip ospf priority <value> interface command. In this case, all
routers have the same priority, but RTD has the highest RID, and RTC was followed, so RTC was
the BDR.