Which of the following best defines constitutional amendment?

if i am correct the answer is going to be a) the federal program of reconstruction ended.

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.

this is false

richard nixon was the 37th president of the united state and didn't serve as a vice president for any president before him