Well, it's not the Ku Klux Klan, as that was a large group of people who wanted to have slaves all return to their work, I've never heard of C, and we barely touched on D in school. From what I've learned, however, the Freedmen's Bureau helped former slaves by supplying food, providing education and homes, etc.
Based on information, your corrct answer would be Option C. Before battles, the Persian Empire became very strong, and they had a good leadership mainly because of Cyrus. And because they were so strong and they had enough power, they simply just drove them out of their land and expanded there land control over to Asia.
Indentured servants are people who were in england that didn't have the money to pay for the ship ride over to the colonies. So, these people agreed to work for a weathly person (for free) for a set amount of time in exchange for the money to buy the boat ticket.
East is forward, west is backwards
Mercantilism. A colony will send over raw materials for the Mother country to process and the colony will also buy finished goods from the Mother country for economic growth.