Most executive departments, such as the Department of Defense, are headed by a . A. committee chair

B. judge

C. secretary

D. governor

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