Refer to the exhibit. Router RTA is the hub router for routers RTB and RTC. The Frame Relay network is configured with EIGRP, and the entire network is in autonomous system 1. However,router RTB a nd RTC are not receiving each other's routes. What is the solution?（）

• A、Check and change the access lists on router RTA
• B、Configure the auto summary command under router eigrp 1 on router RTA
• C、Configure subinterfaces on the spoke routers and assig n different IP address subnets for each subinterface
• D、Issue the no ip split horizon command on router RTA
• E、Issue the no ip split horizon eigrp 1 command on router RTA
• F、Configure a distribute list on router RTA that allows it to advertise all r outes to the spoke routers