Which of the following is an example of the importance of monks in the spread
of Christianity?
A Pope Gregory I’s conversion of the Anglo-Saxons
B Cyril and Methodius’ conversion of the Slavs
C Patrick’s conversion of the Celts in Ireland
D Paul’s conversion of the Greeks

C Patrick’s conversion of the Celts in Ireland

Explanation:

What needs to be stress out in here is that Saint Patrick can be seen as someone who started monasticism. He appointed Irish monks who were spreading Christianity across the Celtic tribes. Because of his work on spreading of Christianity he is seen as a saint in Catholicism.