Why was the american federation of labor more successful than the knights of labor in the late nineteenth century?

Which of the following statements described the sons of liberty

What did the incas accomplish? a. written language b. formalized religion c. conquest of the western south america d. formalized government

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