A.
Austria-Hungary attacked German U-boats, leading the United States to send troops to protect its European ally.
B.
German U-boats attacked coastal cities, leading the United States to enter the war to protect its home front.
C.
Britain attacked civilian U-boats, leading the United States to send troops to protect the people of Europe.
D.
German U-boats attacked civilian ships, leading the United States to enter the war to protect its interests.
1 answer
The correct answer is:
D. German U-boats attacked civilian ships, leading the United States to enter the war to protect its interests.
This refers to the unrestricted submarine warfare conducted by Germany, which included the sinking of civilian and merchant ships, most notably the Lusitania in 1915, which contributed to the shift in public opinion and policy in the United States, ultimately leading to its entry into World War I in 1917.
