A student develops a historical argument to support this thesis: In 1950, the United States and the Soviet Union were two of the most powerful countries in the world. She uses the following graphic organizer to structure her argument. Which answer choice could be the student's fourth source?
Assuming that this is referring to the same image that was posted before with this question, the correct response would be the "fall of the Berlin Wall", since this marked the practical end of the conflict between the US the and USSR.
