A couple of questions on History?

Question: A couple of questions on History!?

1)!.!.!.!.!.!.!.!.!.!.warfare was the type of warfare fought during WW1!.
2) The!.!.!.!.!.!.!.Policy allowed foreign nations in China to trade freely in all religions of the country!.
3)!.!.!.!.!.!.!.!.!.!.!.!.is a name given to the movement of african americans who expressed their culture through literature and art!.
4)Which amendment reversed the ban on alcohal!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

1) Trench
2) Open Door
3) Harlem Renaissance
4) 21stWww@QuestionHome@Com

1) trench
2) Open Door
3) I don't know
4) 21st, I believeWww@QuestionHome@Com