The answer is B, “it is a participle functioning as an adjective”
<span>In the context of the novel, "Lord of the Flies," Ralph overcomes Jack's challenge by getting every one on his side. He reminds them about the fire and why its important to keep the fire going, and since Jack has no one on his side he listens to Ralph.</span>
I think you forgot to add the passage along with the question. I am answering the question based on my knowledge and research. "She is gloomy and depressed" is the one among the following choices given in the question that is how Sally's <span>mood correspond to the setting, as described in the passage.</span>
Answer:
I would agree with you that it's C, as it's the only one that makes sense.