The world war two broke out when Germany invaded Poland. Britain and France consequently declared war on Germany to enforce the terms of the Versailles treaty. but they were already late because their appeasement policy had already served to militarize and arm Germany.
The answer is D; nationalism. It is known as the support/love for ones own country or a certain country.
Eastern European Nations.
I think it is the last one if not then it is the first one
