Refer to the exhibit. A network engineer configures OSPF and reviews the router configuration. Which interface or interfaces are able to establish OSPF adjacency?
A. GigabitEthernet0/0 and GigabitEthernet0/1
B. only GigabitEthernet0/1
C. only GigabitEthernet0/0
D. GigabitEthernet0/1 and GigabitEthernet0/1.40
Are you sure, I think C. The rest are passive interfaces