Answer:
they don't match because the calculation is not correct!
Explanation:
I hope it helps I am not that sure but I think is correct!
The correct answer for the question that is being presented above is this one: "B. building of the transcontinental railroad --> disappearance of the frontier." The pair of events that did the first event most directly influence the second is the building of the transcontinental railroad --> disappearance of the frontier.
Um B? not really sure only one would say is B doesn't sound like it would because of organization
