Slaves. Slaves came from Africa, not America!
For 18, i'd say D.
For 19, i'd say D.
In late 19th century during the Russian during the industrial revolution, Keiv became important in trade and transportation specialized in sugar and grain export by railroad and on the Dnieper river.
Try C, if you study how other people get along it will also help you learn how to get along in your personal life as well.
