R1 has four static routes, each of which has a reachable next hop.

When multiple static routes exist to the same destination prefix and all next hops are reachable, the device selects the route with the highest priority , which on Huawei devices means the lowest preference value . In this question, all four static routes point to the same destination network 20.0.0.0/30, but they have different preference values.

The route through 10.1.1.2 uses the default static route preference , which is 60 on Huawei devices. The route through 10.1.2.2 has a preference of 70 , the route through 10.1.3.2 has a preference of 50 , and the route through 10.1.4.2 has a preference of 100 . Since 50 is the lowest value among them, the route via 10.1.3.2 is preferred and installed in the routing table. Therefore, option D is correct. HCIA-Datacom emphasizes that when prefix length is identical, route preference determines which route is active. This principle is widely used in route backup design, where primary and floating backup static routes are configured using different preference values to control failover behavior.