Lincoln does not mention Delaware, Kentucky, Maryland, and Missouri. These states had slaves but were not part of the Confederacy (they were not fighting against the Union). What happens to the slaves in these states

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