Company XYZ plans to run OSPF on a DMVPN network.

A (Additional host routes):Spoke-to-spoke dynamic tunnels in DMVPN phase 3 result in OSPF populating routing tables with multiple /32 host routes for each spoke-to-spoke tunnel, which can impact scalability and routing table size.

Other options explained:

B: Priority changes not typically required.

C: Split-horizon issue is solved in DMVPN phase 3.

D: Spokes dynamically register with the hub; no manual spoke IP configuration needed.