The era of exploration by the Spanish in the area North of the Rio Grande comes to an end when this explorer returns to Mexico having discover nothing in West Texas.

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