Answer:
I think it is C, what happens to us after we die.
The correct answer is - The emperor.
In the Byzantine Empire, the emperor was a monarch that had a complete authority, for both the empire's affairs and the religious affairs. So the emperor of the Byzantine Empire had the final word in everything, and apart from being the head of the empire, he was the head of the church as well and dictated the religious activities and politics in the empire, unlike in the west were the pope was in charge of the church activities and politics.
Russia is by far the biggest landmass in Asia, due almost entirely to Siberia, which stretches all the way to the Pacific Ocean. Much of this area is not inhabited, however.
Other words that go with the same meaning of common knowledge include Ongoing, existence, widespread, popular, etc.