You didn't list any factors, but there were many.
For instance, the USA entered World War I because Germany had sunk a ship with US passengers, the Lusitania, after an agreement that neither would attack in the sea warzone.
Another factor that caused the USA to enter World War I was the Zimmerman Telegram, Germany sent a coded telegram to Mexico in hopes of getting Mexico to ally with them and turn against the USA.
Hope this helps!
The appropriate response is self-fulfilling prophecy. A self-fulfilling prophecy is a forecast that straightforwardly or in a roundabout way makes itself turn out to be valid, by the very terms of the prediction itself, because of positive criticism amongst conviction and conduct.
A explanation because i just took the test
Inflation or if their money is worth less than U.S. dollars
Its objective was to declare that the New World and the Old World to be separate entities. It opposed European colonialism in the new world. The Latin American countries were gaining independence from Spain and Portugal. The US was worried there would be new attempts by Old World countries to try and interfere with or try to conquer the newly independent territories and it would become a battleground. The doctrine was declared this. wouldn't be tolerated. The New world wanted to be left alone to exert its influence.
The threat of France possibly spreading the its monarchial government was a catalyst
