Which attribute eliminates LFAs that belong to protected paths in situations where links in a network are connected through a common fiber?

Interface-disjoint means the backup path doesn't use the same outgoing interface, but it doesn't account for shared physical infrastructure beyond the interface.

A Shared Risk Link Group (SRLG) is a set of links that share a common physical resource, such as a fiber conduit. To ensure true resiliency, an SRLG-disjoint LFA is required, meaning the backup path does not use any link that belongs to the same SRLG as the primary path, thus avoiding a single point of failure.

Linecard-disjoint means the backup path doesn't use the same line card, which addresses hardware redundancy but not shared fiber infrastructure.

Lowest-repair-path-metric relates to the cost of the repair path, not an attribute for ensuring disjointness based on shared physical risks like common fiber.