The answer is B. conquering native tribes
Answer:
1. The British and the US Navy/shipping
2 Madison blamed the English for angering the Indians that attacked frontier settlements.
Explanation:
The above system of United States Constitution is showing three organs of the state i.e Legislative branch, Executive branch and the Judicial branch.
And below each division, their works are given. Aswecan were that, each of the organ is at same height which shows that they are practicing equal powers and they don't interrupt in each others work.
They practice the system of <u>Checks</u><u> </u><u>and</u><u> </u><u>Balances</u> to ensure that none of the organ is enjoying and grabbing too much.
So, the most appropriate option is:

Checks and balances system.
And, we are done !!
#CarryOnLearning...
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First, it brought slavery to an end. Slavery ended with the ratification of the thirteenth amendment. Second, it showed Americans that fighting a civil war is not the way to go.