I believe the answer is b because I have a poster in my room with this on it. Hope it helps!
Answer:
The queens are sad about King Arthur dying
Explanation:
From the excerpt, from the three queens "...rose a cry that shiver’d to the tingling stars, and, as it were one voice, an agony Of lamentation, like a wind, that shrills..." which shows that they were deeply troubled and sad that King Arthur was dying.