A. appointment of Supreme Court justices
Gathering information is another thinking skill. In history you can never jump to conclusions. You must first ask a question about something on the historical timeline. The next step is to research and gather information about the topic. At the end you can draw a final conclusion.
I hope this helps! :)
In the 1860s, most factories were located in the North of the United States, mostly because the South was largely agricultural and remained this way for many years.