How did the U. S. benefit from remaining neutral in W. W.I

Americans adopted a policy of neutrality in WWI because the war didn't concern the United States. It was important for American to stay out of "entangling alliances". Staying out of the war also allowed the US to economically recover from a slowdown.

the answer is a, salt plain

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.