Answer:
The khan was the ruler of the Mongolian Empire. That's why the rulers of Mongolia all had khan after their name (Genghis Khan, Kublai Khan etc.). A farmer would've been a "fyermyer", a priest would've been a "tackhilch" and a soldier would've been a "tsereg". The actually way to say king would've been "khaan" (pronounced xan) not khan.
I will say it's C. It extended over three major continents.
The difference lies in interpreting the two sides of the conflict. McPherson saw the war as the war between the evil South and the good North. He was focused on the abolition of slavery and their integration into the society as free people. Horwitz on the other hand saw South not as evil but as a faction which went to war to protect its economic interests.
The whip is the person responsible for organizing the voters of the party.
