I think it 3. Black Plague
Answer:
It keeps one branch of government from becoming too powerful.
Explanation:
The citizens back then were from Britain and they hated how their king had ALL THE POWER. Therefore, they have made up checks and balances so that a branch doesn't seem tyrannic.
Answer:
Eli Whitney,American inventor, mechanical engineer, and manufacturer, most remembered as the inventor of the cotton gin but should be remembered for the concept of mass production of parts that can be used interchangeably
