Which of the following factors contributed to the rise of the middle class
during the Industrial Revolution?
A. As monarchies fell, many previously upper-class nobles were
forced to take service jobs.
B. The practice of capitalism led to many well-paying jobs that didn't
depend on manual labor.
C. Overcrowding in urban centers resulted in the formation of
middle-class suburbs.
D. An increase in the number of factory jobs available allowed
laborers to earn more money.