Which one of these was a factor in the U. S. Entry in WWI? A) the halt of the Germany army B) the sinking of the Lusitania C) the signing of a peace agreement D) the death of heir to the Italian throne

B) the sinking of the Lusitania.

Explanation:

According to the Library of Congress, a German submarine sabotaged the British-owned luxury steamship Lusitania on May Seventh, 1915, and in the incidence killing withe the British passenger, 123 Americans lost their lives. this event has changed the course of world war because it gave the Neutral United states reason to enter the war from the allied side.

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  b.

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