Refer to the exhibit. When you examine the routing table of R1 and R4, you are not able to see the R1 Ethernet subnet on the R4 routing ta ble. You are also not able to see the R4 Ethernet subnet on the R1 routing table. Which configuration change should be made to resolve this issue? Select the routers where the configuration change will be required, and select the required EIGRP configur ation command(s).（）

• A、R1 and R4
• B、R2 and R3
• C、ip summary-address eigrp 1 10.1.1.0 255.255.255.0 and ip summary - address eigrp 110.2.2.0 255.255.255.0
• D、variance 2
• E、eigrp stub connected
• F、no auto - summary