which router will become the backup designated router (BDR)?

Click the Exhibit button.

In the exhibit, six routers (R1, R2, R3, R4, R5, and R6) are attached to a single Ethernet LAN and configured with addresses in the same subnet. All devices boot at the same time. Which router will become the designated router (DR), and which router will become the backup designated router (BDR)?

A.
DR:R3
BDR: R4

B.
DR: R4
BDR: R3

C.
DR: R6
BDR: R1

D.
DR: R6
BDR: R2