The answers are B, C, and D
Nationalism caused World War 1 . People put nationalism in their country above other countries which caused a lot of conflict
The Answer To What Happened At Dunkirk In The Spring Of 1940 Is:
~Hundreds of Thousands Of Troops Were Rescued From The German Advance In The Nick Of Time.
~The Troops Were Desperately Needed Back On The Home Shores To Help Defend Against A Nazi Invasion.
Hope this helps.