People claimed that blacks and whites were separate but equal because they both received an education even though both were separated, but black schools were poorer and worse and that was an example of racism. what kind of sentence is this?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire