Explanation

From the output, we learn that the current best path is from 10.57.255.11 (which includes “…valid,

confed-external, best“) and this path is 2 ASes away (64955 65003). Although there are some paths

with only 1 AS away (path from 172.16.254.234 for example) but they were not chosen the best path

so AS_PATH was not used to determine the best path -> Answers A and answer C are not correct.

All the paths in the output have metric of 0 and this is the lowest (best) value for this attribute. If we

configure higher MED then it is less preferred over other paths -> Answer B is not correct.

Only answer D is left but LOCAL_PREF attribute should be configured with higher value to be preferred

so we hope “lower LOCAL_PREF” here means higher value. But this is the best answer.