Answer:
Southern cities were small because they failed to develop diversified economies. ... In 1860 the North had approximately 1.3 million industrial workers, whereas the South had 110,000, and northern factories manufactured nine-tenths of the industrial goods produced in the United States.
True propaganda was used to increase support for the war
Since during the Louisiana Purchase, we purchased so much land(technically the whole entire United States). Manifest destiny is our belief to spread from sea to shining sea so, we were motivated to expand to that new land we purchased. That would make the thirteen colonies less crowded and over populated.
"b. An atom is solid material" would be an example of something that is now considered scientifically inaccurate, since we now know that the atom is actually mostly open space.