How does the Hagia Sophia (the Church of Holy Wisdom ) represent the two things that most influenced Byzantine culture-Greco Roman culture and Christianity?

If the imperial dynasty had continued to rule china, it is most likely that a) the economy would have improved rather than weakened b) european nations would have gotten more of a foothold in china c) revolutionary groups would not have gained any power in the country d) communism would not have received support among the poor