Router R1 has working interfaces S0/0, S0/1, and S0/2, with IP address/prefix combinations of 10.10.10.1/24, 10.10.11.2/24, and 10.10.12.3/22. R1's configuration includes the command s router eigrp 9 and network 10.0.0.0. The show ip eigrp interfaces command lists S0/0 and S0/1 in the command output, but not S0/2.
Which answer gives the reason for the omission？（）

A router has been configured with the commands router eigrp 9 and network 72.16.1.0 0.0.0.255. No other EIGRP - related commands have been configured.  The nswers list the IP addresses that could be assigned to this router's Fa0/0 interface.
Which answers list an IP address/prefix length that would cause the router to enable IGRP on Fa0/0?（）