It should be a, because b, c, and d are irrelevant when comes to understanding the context.
Enlightenment, American revolution, French Revolution, Latin American Revolution
Answer:
The United States and it's government changed in the late 1700s and early 1800s was slavery of people in the North and South. The North was industrialized by getting industries and factories and urban areas. ... Stated that through slavery would continue in the South, it would be banned in the territory won from Mexico.
