Which event triggered the United States to enter World War I?

Athe sinking of a cruise ship, Lusitania
Bthe assassination of an Emperor
Cthe reparations repaid to Germany
Dthe acrimony toward Austria

Verified Answer :

Athe sinking of the passenger ship angered the american public and america went to war on the side of the allied powers
Athe sinking of a cruise ship, Lusitania

- - the sinking of a cruise ship, Lusitania event triggered the United States to enter World War I.