Help i need help with thisss

What event most likely had the biggest impact on german citizens on the home front?

What will not cause political parties to change or develop

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