Which most accurately names a situation in which a country wields power over or has impact on a territory?

The correct answer is sphere of influence

A sphere of influence is an area upon which a nation yields power of another,politically,or has an undue influence.The term gained more use politically during the Berlin Conference when european imperialists decraled territorries in africa as spheres in infleunce in an attempt to avert a crisis in europe over colonies.

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.