How did ratification of the 14th Amendment change the United States? It increased the residency requirements needed for US citizenship It established citizenship laws and quotas fro new immigrants It allowed only skilled workers to become US citizens It granted US citizenship to African Americans

The ratification of the 14th Amendment granted US citizenship to African Americans.

Explanation:

The 14th Amendment to the Constitution is an amendment to the U.S. Constitution that defines the acquisition of U.S. citizenship. According to the addition, all people born in the United States are U.S. citizens, regardless of their skin color. The amendment is part of the so-called Reconstruction Amendments and was intended to eradicate the Black Codes created in the old southern states after the Civil War, which once again weakened the position of blacks. At the same time, the 14th Amendment annuls the Supreme Court precedent of Dred Scott v. Sandford of 1857, according to which blacks or their descendants have no right to U.S. citizenship.

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.