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.
A I think not really sure
Answer:
B
Explanation:
She is incorrect because the beaker of water has thermal energy.
I'm not sure but exercise?
