It was a United States foreign policy document. It stated that if European nations tried to colonize land or interfere with states in north or South America it would be seen as acts of aggression which then required us intervention
Answer:
it should be a but not sure
Explanation:
The correct answer is Austria-Hungary
Nationalism started rising after numerous years of wars during the 19th century. Austria-Hungary believed that it had the right to be the great empire that it used to be and that it partially was at the moment. That's why things like world war 1 happened since countries wanted to establish themselves as great.