Briefly explain one development from the period of 1945 to 1990 that could be used to challenge the point of view you identified in Part A. (my part A The point of view reflected in the speech is about the democratic stance on liberty and freedom. Reagan expresses this after declaring a tear down on the Berlin wall to set people free and attain peace. This helped end the Cold War because since Reagan had reduced tensions between the two world powers, Gorbachev removed the Wall of Berlin, setting many people free and letting them create non-communist governments in the Soviet bloc.)

For the United States of America, 1945 to 1964 was a time of high economic growth and general prosperity. It was also a time of confrontation as the capitalist United States and its allies politically opposed the Soviet Union and other communist countries; the Cold War had begun. African Americans united and organized, and a triumph of the Civil Rights Movement ended Jim Crow segregation in the South.[1] Further laws were passed that made discrimination illegal and provided federal oversight to guarantee voting rights.

Early in the period, an active foreign policy was pursued to help Western Europe and Asia recover from the devastation of World War II. The Marshall Plan helped Western Europe rebuild from wartime devastation. The main American goal was to contain the expansion of Communism, which was controlled by the Soviet Union until China broke away about 1960. An arms race escalated through increasingly powerful nuclear weapons. The Soviets formed the Warsaw Pact of European satellites to oppose the American-led North Atlantic Treaty Organization (NATO) alliance

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions