Examine the configuration on R5.Router R5 do not see any route entries learned from R4;what could be the issue? A.HSRP issue between R5 and R4 B.There is an OSPF issue between R5 and R4. C.There is an DHCP issue between R5 and R4. D.The distribute-list configured on R5 is blocking route entries. E.The ACL configured on R5 is blocking traffic for the subnets advertised from R4 .Case3第四小题的答案是B还是C呢?