Those factors were:
city-states
the drawing of political borders
divide and rule policies
They are important because they just are
So I actually have a Social Studies book from my old school, lucky for you, we got to the Cold War.
Here's what the book stated:
One of Reagan's proposals was the Strategic Defense Initiative (SDI). He believed this defense shield could make nuclear war impossible, but the unlikelihood that the technology could ever work led opponents to dub SDI "Star Wars."
Also, I do know that this is also found on another website but thats probably where the book's information came from.
The correct answer is letter C.
Explanation: In this quote <em>"The American continents . . . are henceforth not to be considered as subjects for future colonization by any European powers."</em>
The answer it will be The United States had become the dominant world power.
