What is
is the work of researchers?
resources​

Explanation:

Researchers are responsible for organizing, analyzing ,collecting datas to solve problems and predict. they may specialize in different fields such as sociology, medicine and psychology.

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.

i would say it is the roman empire europe after the norman conquest.