There is an exhibit which shows eigrp configured across the 2 Spokes and one Hub router. Question-is why the spoke routers are not able to see each others loopback ?
A. Network mask used on loopback interface of spoke is invalid
B. Split horizon enabled on Hub is preventing the advertisement
C. Physical layer 1 issue between the Spoke and Hub
D. Split horizon on one of the spoke interface is preventing the advertisement
Answer B
https://www.thebryantadvantage.com/videos-and-tutorials/ccna-and-ccent-tutorials/eigrp-split-horizon/
B
https://www.ccexpert.us/ccie-2/eigrp-split-horizon.html