At the end of the Civil War, what communications system did the railroads use to coordinate their complex flow of rail cars?

Why were Americans worried about Hitler's attacks on Britain, in particular?

a. America had an alliance with Britain that could force the nation into the war. b. Many Americans had British ancestors or ties to businesses in Britain. c. Many Americans still had family members living in Britain. d. If Hitler took Britain, he would have access to an atom bomb. e. If Hitler took Britain, he could use the British navy to attack the Americas.

In 1505, King Manuel I established the Estado da India in order to formalize Portugal's

A. sovereignty over all coastal regions of the Indian Ocean basin. B. right to demand tribute from Macau. C. claims in the Indian Ocean and China seas. D. trading agreement with Ming imperial officials.

Many European peasants of the “New Immigration” were encouraged to emigrate from Europe because

a. cheap American grain undersold the grain they grew even at home. b. of a declining standard of living at home. c. of large landowners’ efforts in Europe to consolidate lands and modernize production. d. of the economic opportunity in America. e. all of these choices.

Who served as the first president of the National Negro Congress?

A) John Davis B) Marcus Garvey C) W.E.B. Du Bois D) A. Phillip Randolph