How do immigrants affect the u. s economy

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

What does the term “escalation” refer to?

Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal. —"the gettysburg address," abraham lincoln which quotation correctly uses an ellipsis to shorten lincoln’s words?