The mountain ranges made borders
The Iron Curtain was a problem because it blockaded access to East Berlin and prevented the free flow of Germans across the borders between East and West Germany. More broadly it prevented the movement of ideas and peoples across this artificially created boundary. And more importantly than that it signified the dividing line of the Cold War between Western Europe and the United States and the Soviet Union which had a major impact on fomenting mistrust and conflict.
During World War II, women in the United States found great more employment opportunities in industrial jobs (D) because they had to make guns and clothing and even had to help with make the atomic bomb.
