Answer:
C. Nicene Creed.
Explanation:
The primary creed developed and adopted by most of the Christian beliefs originated from the Council of Nicea in present-day Turkey. This creed or statement of belief would later become known as the Nicene Creed, from its place of origin and adoption.
The Nicene Creed became and still is the statement of belief for Christians all over the world. It also became the foundational beliefs of Christians and was adopted as the Doctrine for the Church's principles.
Thus, the correct answer is option C.
