Explain how the war in europe brought about an economic boom in united states

I have never been asked that question at all in school

It brought it an economic boom in the U.S because it reduced trade between the nations. This meant that the exports and imports of food and other merchandise would reduce drastically. Also because the U.S had assisted their allies in Europe by sending them money, food, clothing and weapons.

Dcalifornia they have the most people with 200+ people per square mile

C; skin, is the answer!