Which event caused the United States to enter World War I?
(1 point)
Responses
Serbian nationalists shot the Archduke of Austria-Hungary.
Serbian nationalists shot the Archduke of Austria-Hungary.
An alliance with France required the U.S. to help protect them if attacked.
An alliance with France required the U.S. to help protect them if attacked.
Germany sank American merchant ships.
Germany sank American merchant ships.
The Japanese attacked Pearl Harbor.