Refer to the exhibit. A network administrator wants to reduce the number of OSPF routes advertised from Area 1 into Area 2. As the router configuration specialist, what two things would you do to accomplish this goal?（）

• A、Enter the configuration on router B1.
• B、Enter the configuration on router B4.
• C、On the same router, enter the Summary - address 10.10.1.0 255.255.255.128 subcommand.
• D、On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand.
• E、On the same ro uter, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand.