Refer to the exhibit. A company would prefer all Internet - bound OSPF routed traffic to use ISP ABC with ISP DEF as a backup. As the network consultant, what three configuration changes might you make?（）
- A The default -information originate command should be configured on router B1 and B4.
- B The default -information originate command should be configured on router B2 and B3.
- C If the metric value for ISP ABC is set at the default, the I SP DEF metric value should be set to 1.
- D If the metric value for ISP ABC is set at the default, the ISP DEF metric value should be set to 25.
- E The metric type value should be set to type 1.
- F The metric type value should be set to type 2.