The correct options are
A The first wave of new democratic governments came in the early part of the 20th century, following the end of World War I.
C The clash between multiple nations and ideologies was a significant factor in the breaking out of World War II.
D The end of World War II saw the rise of newly sovereign Asian and African countries which adopted democracy.
Through the course of the twentieth century, democracy became the dominant form of government in the world. After WWI and the Treaty of Versailles, many nations adopted democracy. However, the ideals of democracy were threatened with the rise of Nazism and Fascism, both of which were among the main causes for World War II. The war lasted 6 years, between 1939 and 1945. The end of the war saw the rise of newly independent Asian and African countries which adopted democracy, such as India, Pakistan, Ghana, Myanmar, etc.