Answer:
im not entirely sure, but it i think it was the slash and burn. (it might not be a system though)
Explanation:
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Eisenhower Doctrine pledged to support the help of any country resisting communist aggression.
The event that ultimately led to World War I was the assassination of Franz Ferdinand and this led to war across Europe.
<h3>What is World War I?</h3>
Your information is incomplete as the options aren't given. Therefore, an overview will be given.
It should be noted that World War I simply means the first world war that occured between 1914 and 1918. The event that ultimately led to World War I was the assassination of Franz Ferdinand.
Learn more about World War I on:
brainly.com/question/8535233
In short. Russia is cold and America was there a lot...
