Gawain wears the green girdle as a symbol of his weakness. He behaved deceitfully and returned to Camelot bearing the girdle as a symbol of his failure in keeping his vow.
B is a fact because it's just one point, whereas A, C & D are a point with an explanation- more likely a persons opinion.
Hope this helps!!
Poems may work in this question.
Hope this helps!
You characterize it by antagonism.