Refer to the exhibit. An engineer must design a WAN solution so that ISP-1 is always preferred over ISP-2. The path via ISP-2 is considered as a backup and must be used only when the path to ISP-1…

Without the content of option A, a specific technical reason cannot be provided, but it would imply a configuration that either does not influence path selection effectively or incorrectly prioritizes ISP-2.

Assuming Option B represents a BGP configuration that sets a higher local-preference or weight for routes learned from ISP-1. By assigning a higher local-preference or weight to routes received from ISP-1, R1 will prioritize ISP-1 as the primary path for outbound traffic, while ISP-2 will serve as the backup.

Without the content of option C, a specific technical reason cannot be provided, but it would imply a configuration that either does not influence path selection effectively or incorrectly prioritizes ISP-2.

Without the content of option D, a specific technical reason cannot be provided, but it would imply a configuration that either does not influence path selection effectively or incorrectly prioritizes ISP-2.