C, because that was basically one of the reasons for the Civil War as well. The Northern and Southern states were always fighting about whether slavery should expand west or not.
Answer:
Some long-term effects that occurred after the Civil War were the abolishment of slavery, the formation of blacks' rights, industrialization and new innovations. The Northern states were not reliant on plantations and farms; instead they were reliant on industr
B. Japan rapidly developed an industrial economy
