BCE means Before Common Era and CE means Common Era. Would the year 2020 CE go to the left ? Why? 10 POINTS I NEED ASPA

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