Dynasty.
EXPLANATION
A dynasty is a series of leaders in the same family, like the British Royal Family, or a local business dynasty, in which four generations have made their fortune at the family store. The word dynasty, comes from the Greek word dynasteia, which means "power, lordship, and sovereignty."
I'm not sure but i think it would be B.
Its location near Celtic and Germanic tribes, which became true after the empire was attacked many times by the Germanic Turks.
Hope I helped. :)
