Hello.
The most suitable answer is A) use of gold and C) portrayal of a story.
Byzantine artists are known for the use of gold in their sculptures in the backgrounds or it was used to highlight some aspects of the mosaics for example. Also, bizantine artists are known for their efforts to portray teological stories, and to insert imperial propaganda into their sculptures.
Hope this helps.
They both are democratic systems
He called it the Iron curtain because Russia separated from Europe. Hope this helps!
