Respuesta :
the one that was a factor in the U.S entry in world war I was :
B. the sinking of the Lusitania
hope this helps
B. the sinking of the Lusitania
hope this helps
Answer: A.
the halt of the German army
Explanation:
The United States entered the war because of the Germans' decision to resume the policy of unrestricted submarine warfare, and the so-called "Zimmerman telegram," intercepted by the British, in which Germany floated the idea of an alliance with Mexico.