In old Roman days, monarchs opposed Christ. But now kings comprehend, and because of what they have learned they serve out Lord Jesus Christ in fear; and therefore, today kings are vassals of the Church.

How does the text characterize the relationship between kings and the Church?
a) Kings oppose the Church and its authority
b) Kings are vassals of the Church and serve Christ
c) Kings have no obligation to the Church
d) Kings have equal authority with the Church