The answer is C & A because they are the most logical
The answer should be C. Third person omniscient. A narrator in this point of view, narrates the story. The narrator is aware of everything going on, and all the character's feelings.
Hope this helps!:)
I would go with option B. Formally explain something important. It seemed to me that he was trying to get his point across, while still having a respectful attitude. I hope I could help!
The Byzantine era (330–1453) came after the Middle Ages
The word that serves as a clue of cause and effect is "Since".