Answer:
D. Germany sunk the Lusitania, causing 128 American deaths.
Step-by-step explanation:
The sinking of the RMS Lusitania by Germany was one of the main reasons why the United States decided to enter World War I. The Lusitania was a British ship that was sunk on May 7, 1915 off the coast of Ireland by a German U-boat. The ship was not armed for battle, and 128 American passengers died in this disaster. This shifted public opinion in the United States, leading to a declaration of war two years later.