The combination between religious and political aspects in the Abbasid state's concept of rulership is best reflected in which of the following?

D. The Abbasid state was headed by a caliph who was theoretically the state's supreme religious and political leader.

Explanation:

Caliphs were interested in holding political and religious power within Abbasid state. They tried to run the government based on Islamic approach rather than secular approach.

Their orientation was towards the Islamic approach in the governing of the state and making of rules and regulations based upon Islamic beliefs. They managed to stick by the Islamic norms in the politics of the Abbasid politics.

These are the reasons for the combination between the religious and political aspects in the Abbasid state's concept of rulership.