Answer:
James Madison. the system set up to maintain a balance of power among the three branches of government is called. checks and balances.
B. <span>It keeps one person or group in government from having too much power.</span>
Answer: over thirty thousand miles
Explanation:
In 1840 it had almost reached three thousand miles
And by 1850 it was more than 90 thousand miles.
The basic definition is the district near a border.
But for history, it's Lands on the edge of Spain's claims.
Hope this helps :)