The best answer that captures both the qualities of chivalry and the contradictions to those ideals is:
A) Gawaine shows chivalry by fighting bravely but fails to show mercy.
This response highlights a quality of chivalry—fighting bravely—while also addressing a contradictory action, which is a lack of mercy, an important aspect of the chivalric code. The other options do not adequately represent a clear contradiction between chivalrous actions and unchivalrous behaviors.