Most ancient people tended to be polytheistic - C.
monotheistic religions came much later, while earlier religions were predominately polytheistic where people would worhip many dieties specialized for the different aspects of life.
The correct answer is B. religious affairs.
This was a type of early separation of powers but they still worked together. The church and the state were separated and controlled by different people, but the people were close so they both worked together essentially and ruled as they wanted.