Question

Which of these was a factor in the U.S. entry in World War I?

Answer 1

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

Answer 2

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.