Refer to the exhibit. OSPF is configured on all routers in the network. On the basis of the show ip ospf n eighbor output, what prevents R1 from establishing a full adjacency with R2? ()<br /> <img src="https://nimg.ppkao.com/2018-07/yiyu/2018073015404016990.jpg?sign=615057eb881c5c44cfb17a16bf9c73bf&t=62d07996" />
A、Router R1 will only establish full adjacency with the DR and BDR on broadcast multi- access networks.
B、Router R2 has been elected as a DR for the broadcast multiaccess network in OSPF area 1.
C、Routers R1 and R2 are configured as stub routers for OSPF area 1 and OSPF area 2.
D、Router R1 and R2 are configured for a virtual link between OSPF area 1 and OSPF area 2.
E、The Hello parameters on routers R1 and R2 do not m atch.