One disadvantage to using a primary source, such as a letter or diary is

A disadvantage of primary sources, such as diaries is that the source  may be too close to the subject. Consequently, it lacks the critical distance that would make it a reliable source. It may also be time consuming to obtain the required information

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.