PLEASE HELP BEST ANSWER GETS BRAINLIEST

Answer:
Third one
Explanation:
The American experiment was unique and improbable in 1776, when Thomas Jefferson penned the Declaration of Independence and the American colonies defied Britain, the most powerful nation on earth at the time. As we look around the world at how difficult it is for democracy and freedom to take hold and flourish, America seems like a political miracle.
Wish I could get brainliest....