I believe the correct answer is the vikings.
Hope it helps!
On what book you have to say the name of the book so people can answer you question
Should seem pretty obvious but the traders gained goods from their trade which is a benefit and slaves being slaves, suffered.
The country that was last to join the Allied Powers was Great Britain.
The Zimmermann Note was first suspected of being a forgery by the British, to make the Americans think that Germany wanted to cause war for the USA, and thus pushing the Americans to help the British. However, while the USA government officials were still debating whether this was a genuine note, the German Foreign Secretary, Arthur Zimmermann himself, admitted the note was genuine.
There would have been no reason for Zimmermann to falsely claim that this note was true, as this admission would have caused America to indeed join the war against the Germans.