Answer:
d. Stressed that Islam was not just a religion but also a way of life.
Explanation:
Prophet Muhammad was the founder of the Islam religion. He was also a political leader who believed in the presence of a single god.
His teachings became the basis for the Islamic/ Muslim religion. One of his teachings was that he stressed the importance of Islam not only as a religion but also as a way of life. He also gave "the Five Pillars of Islam" which include the acceptance of one God, giving of alms to the poor, fasting, praying, and also a pilgrimage to Meca.
Thus, the correct answer is option d.