The basic cause of World War II wasan unjust Treaty of Versaillesrise of the Nazi Party in GermanyJapan's policy of expansion and imperialism of England and FranceAll of the above

The basic cause of World War II was a combination of several factors.

1. Unjust Treaty of Versailles: The Treaty of Versailles ended World War I but it was seen as unjust by many, especially Germany. The treaty imposed heavy penalties and restrictions on Germany, which led to economic hardship and resentment among the German people. This created a fertile ground for the rise of extremist parties.

2. Rise of the Nazi Party in Germany: The economic and political instability in Germany following World War I and the Treaty of Versailles led to the rise of extremist parties, including the Nazi Party. The Nazis, led by Adolf Hitler, capitalized on the resentment towards the Treaty of Versailles and the economic hardship to gain power.

3. Japan's policy of expansion: At the same time, Japan was pursuing a policy of expansion in the Pacific. This led to conflicts with other powers, particularly the United States and Britain, who had interests in the region.

4. Imperialism of England and France: The imperialism of England and France also played a role. Their control over large parts of the world, particularly in Africa and Asia, led to conflicts with other powers, particularly Germany and Italy, who also wanted to expand their empires.

So, the answer is "All of the above".