<span>The United States would use economic and military measures to prevent the spread of Communism.</span>
B. unfair treatment can be considered a PUSH FACTOR.
Push factors encourage people to leave points of origin to settle in areas elsewhere.
I think the correct term to fill in the blank would be "thesis". The main point or central idea that a writer states and then endeavors to prove is called a thesis. It is <span>a statement or theory that is put forward as a premise to be maintained or proved. Hope this answers the question. Have a nice day.</span>
