In describing the Friar as a noble pillar to his Order Chaucer uses A hyperbole B irony C poor grammar D parentheses?

A: Hyperbole.

By describing him like that, in an exaggerated fashion, he's trying to create a strong impression on the reader, rather than meaning he is literally a stone support column. Chaucer is getting across the idea that the Friar is a noble man and an asset to his order, a great support to them.