Answer:
The answer would be D
Step-by-step explanation:
The sinking of Lusitania didn't directly cause the United States to enter the war. It did, however, fuel virulent anti-German sentiment in Britain and the United States and hinder diplomatic relations between Germany and the United States.
The Zimmerman telegram stated that Germany planned to return to unrestricted submarine warfare and would sink all ships – including those carrying American passengers – located in the war zone. The telegram also proposed an alliance between Germany and Mexico should the United States decide to join the European Allies.