Explanation:
I suppose the answer is B
Agriculture turned the course of history because it allowed previously nomadic tribes to settle down in one place for an extended period of time.
First of all... what period? because if you are talking about this time, I think it is becaise they want to feel powerful to be able to have more allied countries in any situation, they also do it because they want to control most of the world natural sources that other countries have.
Not entirely sure what you mean by this unless you mean specific interpretations of the constitution, which is considered judicial review which was established in Marbury v Madison, also known as an informal amendment.