![According to William Riker, what is the commonality found across many cases of federalism?](https://www.gkseries.com/blog/wp-content/uploads/2022/01/According-to-William-Riker-what-is-the-commonality-found-across-many-cases-of-federalism.png)
Q. According to William Riker, what is the commonality found across many cases of federalism?
A. It is the result of bargaining by foreign powers as they impose a political system on a territory
B. It is the result of a bargain among regional actors and a prospective national government that is driven by external threats
C. It is a result of territorial bargaining by elite powers as they develop a national system in a region
D. This is a trick question: Riker identifies no such commonality, declaring that “all cases are perfectly unique.”
Answer: It is the result of a bargain among regional actors and a prospective national government that is driven by external threats