The answers are B, C, and D
This kind of depends on which emperor but probably D since C and A are situational
I'm no expert on this, but I would say conquoring other lands and kingdoms. Going into battles and winning. Taking over cities, and stealing their items. They were very powerful back then, and demanded respect.
~Silver
Answer:
Constantinople was considered Constantine I's greatest achievement because the city was a political and economic center. ... The Byzantine Empire had in Constantinople a cosmopolitan place where any kind of thoughts and religious could exist with tolerance and respect
Explanation: