It's the second one that's correct...
People needed food to eat from the farmers. Without food people could starve.
Answer:
B - The sovereignty of all the states in the union was weakened.
Answer:
City-state, a political system consisting of an independent city having sovereignty over contiguous territory and serving as a centre and leader of political, economic, and cultural life.
(I don't know how it spreaded though, sorry :<)
The answer is A, bc u can clearly see the rest are effects of the spanish Colonies