The correct answer is C) the Selective Service Act.
The act of Congress that was part of the effort to prepare the US military for entrance into world war I was the Selective Service Act.
After maintaining for some time the foreign policy of neutrality, the United States entered World War I on April 6, 1917. President Woodrow Wilson asked the American people to support the war effort in any possible wat. Congress passed the Selective Service Act on May 18, 1917. This act required that American men from 21 years old to 30, enlisted to participate in the military service.
I know this because the black people were slaves and were all pretty poor because everyone at that time was racist and thought white people were superior but everyone should be treated the same.
