Answer:
B) New theories recognized that explanations were not always possible
Explanation:
I took the test before, 100%
The Stamp Act and Quartering Acts were introduced (a huge tax on all printable objects and placing soldiers in colonists' homes, respectively)
The reason why northern cities saw in increase in population after the american civil war was: the flight of former slaves from the south
Following the american civil war, people in southern states still treated the ex-slaves that freed by abraham lincoln very poorly. To escape this treatment, the former slaves decided to flight to the northern states in hope for better societal treatment and job opportunities.
