Answer:
Option: The strength of the Catholic Church derived in large part from the fact that nearly all Christians lived in the European lands under its religious authority.
Explanation:
Christianity spread throughout the Roman empire and reaches beyond its borders and places like England, Ireland and among Franks. During this period, Christian monasticism began to come up. It was a devotional practice where individuals lived a life of a hermit and dedicated to worship
After the collapse of the Western Empire, the involvement in papal affairs replaced by Germanic rulers. Popes forced to make grants to authorities in exchange for security. In 590, during Pope Gregory I Papacy, Europe was under famine, plague, and faced threats from outsiders. Gregory turned the papacy’s attention to the Germanic peoples, in this way the West entered into the papacy.