The structure of American federalism:
a. has contributed to the longevity of the U. S. government by forcing every state to develop in exactly the same way.
b. contributed to the longevity of the U. S. government by allowing many divisive policy decisions throughout American history to be made by states.
c. has had almost no effect on the stability and functioning of the U. S. government.
d. caused the Civil War to be fought decades before it would have been under a unitary system.

Option B

Explanation:

We can say the all the states in the United states developed at the same way, New Orleans is not has developed as los angels or new York, Because they don't have the same resources our economic structure. Federalism in the united states as allowed all the states to grow independently, grow based on there capability and strength, and the federal government only comes in when the states is not in capacity to handles situations that are not in its jurisdiction. So federalism has help the US in longevity, allowing many divisive policy decisions throughout American history to be made by states.

in this part of the declaration it refers to the point when american people didn't recognize the british domain and   breaks the political bands with britain, they forced a respectful separation.

mankind was created and entitled equally with rights   which were life, freedom and the seeking for happiness.

the correct answer is d