If the excerpt is,
<span>If I without discourtesy might quit this board,
And if my liege lady misliked it not,
I would come to your counsel before your court noble.
For I find it not fit, as in faith it is known,
When such a boon is begged before all these knights...
"She guided me in this guise to your glorious hall,
To assay, if such it were, the surfeit of pride
That is rumored of the retinue of the Round Table.
She put this shape upon me to puzzle your wits,...
"Behold , sir," said he, and handles the belt,
"This is the blazon of the blemish that I bear on my neck;
This is the sign of sore loss that I have suffered there;
For the cowardice and coveting that I came to there;
This is the badge of false faith that I was found in there,...
"No, by God," said Sir Gawain, "that granted me life,
I shall grudge not the guerdon, grim though it prove;
Bestow but one stroke, and I shall stand still,
And you may lay on as you like till the last of my part
be paid."
Then the answer would be </span>"Behold , sir," said he, and handles the belt,
"This is the blazon of the blemish that I bear on my neck;
This is the sign of sore loss that I have suffered there;
For the cowardice and coveting that I came to there;
This is the badge of false faith that I was found in there,...
The first option, "[she] just couldn't stand another minute of the incessant howling", seems to be the best one to finish the paragraph. First of all, the paragraph has very specific and powerful vocabulary like "bopping his head" and "burst". So a concluding sentence should also have strong vocabulary. In this case "howling" is a very descriptive and powerful verb. Moreover, in the paragraph, the narrator mentions that "[the] lead singer sounded as (...) a dog lost in the woods". Using the word "howling", which is something done by dogs, in the concluding sentence would be consistant with the comparison between the singer and a lost dog.