Answer: 17th amendment
Explanation: i googled it
Answer:
The US was able to maintain its independence
One can say that dominating fire was one major breakthrough. Men were already using rock tools in this age and it was an amazing breakthrough in history of man, but learning how to dominate fire was a game changer. It made them live longer, since they had a way to scare the predators, make light at night and to defrost meat.
Montesquieu believed in separation of power and that one branch should not be significantly more powerful than the other. Considering this, your answer is the last one.
Hope this helps!
