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.
Answer:
The option you chose was correct.
The construction of the Berlin Wall was kinda the start of the Cold War.
The soviet control of the German citizens could not have possible been increased since the Berlin Wall falling was a sign of the Soviet Union downfall.
The United States had no say in the Cold War, only espionage played a role.
The printing press helped promote European exploration in the fifteenth century. It allowed people to communicate ideas easier and faster.
Hope that helped!
