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.