Which event helped draw the United States into World War I in 1917?
AGerman unrestricted submarine warfare and the Zimmermann Telegram
BThe Japanese attack on Pearl Harbor
CThe assassination of President Lincoln
DThe fall of the Berlin Wall
Explanation
Germany’s sinking of ships (including those carrying Americans) and the Zimmermann Telegram—proposing a German-Mexican alliance against the U.S.—pushed the U.S. to declare war in 1917.