The bright blue leather bag
It can be said that chivalry affected the characters when the Knights exhibited their behavior. The Green Knight challenged the knights´honor and so Sir Gawain asked the King to accept that challenge. It seems that he wanted to show his loyalty (value of Chivalry) to King Arthur. Later on, the Green Knight promised to keep his word (value of Chivalry).
The answer is "true story".
An autobiography is a nonfiction account of somebody's life, written by themselves. It is often in first person.
The answer to your question is B
