Refer to the exhibit. The route for 10.220.100.96/27 has been very unstable. The same route has four backups to routers A, B, C, and D via the respective methods. The routing protocol defaults for router Y have not been changed. When the current route for 10.220.100.96/27 becomes unavailable, which router will router Y use to route traffic to 10.220.100.96/27?