What was the period in which new territory was acquired known as?

(a)expansion
(b)industrialization
(c)urbanization

Oque provoca coroço no peito do homen?

What is the liberal pov on social issues

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