Answer:
The Progressive Era is considered from 1890 to 1920. The major role of the United States in global affairs during this period of time was its involvement in the war.
The military affairs of that time included the war with Spain, the war to conquer the Philippines and the entry into the First World W
Samuel Gompers began the federation of labor.
The correct answer here is C.
The Cold War was waged on many fronts. They may not have been literal fronts in classic sense but fronts nonetheless. There were proxy wars but also cultural and economic wars as well. The reduction of oil prices by Saudi Arabia were significant because they hurt the struggling economy of the Soviet Union.
