I believe it would be the Jim crow law
The jim crow law is a set of regulations that is aimed to racially segregate the infrastructure that can be used by black and white citizens after the reconstruction.
The laws prohibit blacks citizens to use the same schools, public transportation, restaurants, or hospital as the white citizens.
Since the infrastructures that can be used by black citizens typically lower in quality, it really limited the chance that black people have to advance and prosper in the society.
In the Northern british colony life was mostly depending on trade and manufacturing because farming was out of the picture.
In the Middle british colony life was mostly depending on ship building and harbors because of the great access to the water.
In the Southern british colonies life was mostly depending on farming because the soil in the south was rich and great for crops.
I believe that the answer is B
