Respuesta :
The best evidence to support the conclusion is D “Because of his fluency in the language, he was able to reach members of the Celtic community who could not understand other missionaries.”
How did spending time in Ireland help Patrick?
As a result of him spending time in Ireland, Patrick was able to learn the language.
This helped him in his missionary work because he was able to preach to people in Ireland who were unable to understand other missionaries because those people (Celts) only spoke Celtic.
In conclusion, option D is correct.
Find out more on the Celts at https://brainly.com/question/5633928.