The process of the united states entering world war i was drawn out. no single event caused the united states to intervene. put the events in the order in which they occurred that led to the united states' participation in the war.

a. the rms lusitania, which was carrying a cache of arms, was sunk by german submarines. b. germany announced its intention to resume unrestricted submarine warfare against ships sailing to or from the british isles. c. the zimmermann telegram was intercepted. in it, germany promised to mexico recover territory lost to the united states when it joined the war. d. wilson authored the fourteen points.

Correct order is B, A, C, D

Explanation:

World War One began in 1914 but US did not join the war until 1917. It had significant impact on the war as it tipped the balance of war in the favour of the Allies.

Germany was the first country to introduce unrestricted submarine warfare in early 1915. The area around British Isles was declared a war zone by Germany.  It was when Germans sank the USS Lusitania in 1915 that killed 1198 passengers, US government send a note to the German government demanding to stop the attacks.

Zimmerman telegram was intercepted and Deciphered by British intelligence in January 1917, it instructed the German ambassador to Mexico to aid Mexico if it agreed to be a German ally in any US-German conflict.  After this US officially declared war on Germany.

The fourteen points was the statement of principles for peace that was to be use for peace negotiations to end the first world war. He outlines the principle while delivering a speech on peace terms and war aims to the congress on January 8,1918.

d is the right answer