Answer:
A) Soviet efforts to create communist governments in Eastern Europe after WWII.
Explanation:
In 1947, after Britain´s announcement that it would stop aiding the Greek government to fight a communist insurgency, the Truman administration stepped in and said it would provide assistance to Greece and Turkey, which was also facing a communist threat. Since that moment on, the USA would oppose Soviet Union´s efforts to support communist movements in Europe by providing economic, military and diplomatic assistance to countries under threat.
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Marie Curie was the scientist whose private papers had to be decontaminated for two years in the 1990's before being put on file at the National Library in Paris. Marie Skłodowska Curie was a Polish and naturalized-French scientist and chemist who escorted pioneering analysis on radioactivity. She said that being a historian is not without its jeopardies.
The main reason why so few violations of the Sherman Antitrust Act were brought to court was because the government was slightly corrupt, with some people in charge of prosecuting these cases "in bed" with those breaking the law.
Read this portion if the article hope it helps. I unfortunately don't know how to explain it to you.