Which of the following contributed to the collapse of peace in 1939? select all that apply.

nationalism

appeasement

failure's of the league of nations

wwi peace treaties

WWI peace treaties

Explanation:

The Treaty of Versailles (French: Traité de Versailles) was the most important of the peace treaties that brought World War I to an end. ... Although the armistice, signed on 11 November 1918, ended the actual fighting, it took six months of Allied negotiations at the Paris Peace Conference to conclude the peace treaty.

d. it adversely affected american productivity

which time period is this? or is this story fictional, i'm going to need more info to answer this question