Refer to the exhibit.A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a ne...

Refer to the exhibit.A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?

A. Modify the next-hop attribute on R3. B. Use AS-Path prepending on R3. C. Modify the next-hop attribute on R4. D. Use AS-Path prepending on R4.