A、EIGRP works on F0/0 and S0/0/0 without further configuration
B、EIGRP works with the addition of one command: a no shutdown command in EIGRP router configuration modE
C、EIGRP works with the addition of one command: an eigrp router - id command in EIGRP router configurat ion modE
D、EIGRP for IPv6 needs at least two more configuration commands before it works on R1