Before the Civil War, most people in the North worked in factories.
With the end of the Civil War came a great transition into a mechanized and factory-based economy, which took workers away from the farms and put them into the factories. Many people saw this is corporate great, which was in some ways true--this led to the formation of many unions and workers organizations.
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option is "exercise" since it can clear the mind. </span>
B) Federal Reserve Policy I think since he was dealing with inflation