Five reasons why it was difficult for the U.S. to remain neutral during WWI?

Question: Five reasons why it was difficult for the U!.S!. to remain neutral during WWI!?
Best Answer - Chosen by Asker:

Zimmerman note
Louisana sinking
Ensure Allied Repayment of debts to the us
To prevent the germans from threatening us shipping
Uboats!?Www@QuestionHome@Com

The big reason was that we couldn't do any normal business
while the war was on, so we lost giant piles of money!.Www@QuestionHome@Com