Which of the following directly violated the intent of the fifteenth amendment to the constitution? poll taxes first-class railroad tickets racially segregated hospitals racially segregated schools

Poll taxes  

Explanation:

The Fifteenth Amendment (1870) was the law that granted African American men the right to vote for the first time in the U.S. However, ever since it was enacted, Southern states tried to put conditions and obstacles to deny them their right to vote. The establishment of poll taxes were one of those obstacles as many African Americans could not afford to pay them. But it wasn't until the Civil Rights Movement that poll taxes became illegal.