The correct answer is option C. "NATO was established to fight the spread of communism, while the Warsaw Pact was formed to protect communism". The purpose of creating the North Atlantic Treaty Organization (NATO) and the Warsaw Pact was basically the opposite. NATO was formed of the United States and 11 more western countries to fight the spread of communism, and the Warsaw Pact was the affiliation of the Soviet Union and other Eastern Europe countries to protect communism.