Answer:
North Atlantic Treaty Organization; Warsaw Pact.
Explanation:
Answer: C. North Atlantic Treaty Organization; Warsaw Pact
Explanation: In the early Cold War, the North Atlantic Treaty Organization (NATO) was formed for common defense against the Soviet Union. Then, in response, the Soviet Union formed the Warsaw Pact. The North Atlantic Treaty Organization is a military alliance formed by Western European countries, Canada, and the United States in 1949. Its main purpose was to provide mutual defense against the Soviet Union and its allies during the Cold War. The Warsaw Pact was a military alliance formed by the Soviet Union and its satellite states in Eastern Europe in 1955. Its purpose was to provide mutual defense against NATO.
Learn more about the Cold War here: https://brainly.com/question/16203731.