Why are secondary sources important to the study of history?
(a).museums usually contain the majority of these sources.
(b).these sources provide information written by other authors.
(c).these sources include bones and weapons.

They help explain new or different positions and ideas about primary sources.

Explanation:

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.

polticians and sentates thought to annoucne the fialre of articles of confedartion by making a centralized nation as a hole