Question

In the end, the popes won supreme control of the church because

a. Of their claim to be spiritual descendants of St. Peter
b. Of religious differences with the patriarch of Constantinople
c. Both of their claim to be spiritual descendants of St. Peter and of their position in the original imperial capital of Rome
d. Of their position in the original imperial capital of Rome

Answer 1

In the end, the popes won supreme control of the church because "c. Both of their claim to be spiritual descendants of St. Peter and of their position in the original imperial capital of Rome," since central authority at this time was crumbling.