The correct answer is B) Laws were based on the religious teachings of Muhammad.
The statement that is true of the Islamic State which existed under the caliphates "Laws were based on the religious teachings of Muhammad."
The religious teachings of prophet Muhammad are strictly followed by Muslims, and the Caliphate was no exception. The teachings of Muhammed are based on the 5 Pillars of Islam and are the Shahada or the profession of the Muslim faith, the Salat or the prayers on a daily basis, the Zakat or sharing one's wealth with other people, Saum or the fasting during the Ramadan, and the Hajj or the pilgrimage to Mecca, at least one time in the life of a Muslim individual.