A concept map refers to a type of representing the ideas in the diagrammatic form. The ideas are presented in the downward structure of hierarchy. The main idea is written and the sub-topics and other related topics are written in the downward branches.
David is more likely to apply the concept map form of making notes. He re-frames the notes after he is back from school to make the notes more accessible to him. Restructuring the notes to make it more learning-oriented is what David would do as a visual learner.
I've never read the book but i'm guessing that the answer is A because the Friar is already a religious man and so to be working as a priest would seem like a thing he would do.