Which three checks must you perform when troubleshooting EIGRPvB adjacencies? (Choose three.)
A . Verify that IPv6 is enabled.
B . Verify that the network command has been configured.
C . Verify that auto summary is enabled.
D . Verify that the interface is up.
E . Verify that an IPv4 address has been configured.
F . Verify that the router ID has been configured.
Answer: ADF